Chains

July 14, 2014

updated 2020-06

Contents:  1. Chain Sizes
Contents:  2. Moped Chains
Contents:  3. Master Links
Contents:  4. Chain Service Topics

Contents:  5. Myrons Chain List

Contents:  6. Moped Chain History

 


1. Chain Sizes

Chains

 

 

 

 

 

 

 

 

Pitch is the distance from one link to another. Pitch matters the most. The pitch, in eighths of an inch, is the first digit of the motorcycle chain size. 

Roller Width (Wr) is the distance between the insides of the chain inner plates.

Named width is the minimum width of chain, and the maximum width of sprocket. The named width, in eighths of an inch, is the second and third digit in the motorcycle chain size.

Roller Diameter (Dr) is the third thing that matters for fitting a given sprocket.

Any replacement chain must have the same pitch and roller diameter (Dr). The roller width (Wr) should be the same but can be a little more. The roller width is correct for the sprocket width when the chain can move side-to-side on the sprocket, but only a little bit. So the sprocket width needs to be a little less than the roller width.

410, 410H  4/8 x 1.0/  pitch    roller 0 Dr 0 Dp  0  Wr 0   sprocket
410, 410H  4/8 x 1.0/
pitch x width 0 Dr 0 Dp 0 range     width     Cycle chains      
410, 410H  4/8 x 1.0/8  1/2 x 1/8″0 7.95  3.58  3.2-3.5  2.6-2.9  bicycles (without derailleur)
415, 415H  4/8 x 1.5/8  1/2 x 3/16″ 7.95  3.58  4.8-5.3  4.2-4.5  most mopeds, motorcycles
420, 420H  4/8 x 2.0/8  1/2 x 1/4″0 7.95  3.97  6.3-6.5  5.7-6.0  some mopeds, motorcycles
425, 425H  4/8 x 2.5/8  1/2 x 5/16″ 7.95  3.97  7.9-7.9  7.2-7.6  motorcycles
428, 428H  4/8 x 2.5/8  1/2 x 5/16″ 8.51  4.76  7.9-7.9  7.2-7.6  motorcycles
520, 520H  5/8 x 2.0/8  5/8 x 1/4″0 10.2  5.08  6.3-6.3  5.7-6.0  motorcycles
525, 525H  5/8 x 2.5/8  5/8 x 5/16″ 10.2  5.08  7.9-7.9  7.2-7.6  motorcycles
530, 530H  5/8 x 3.0/8  5/8 x 3/8″0 10.2  5.08  9.5-9.5  8.7-9.1  motorcycles
630, 630H  6/8 x 3.0/8  3/4 x 3/8″0 11.9  0.00  9.5-9.5  8.7-9.1  motorcycles

43, 000   4/8  x  1/   pitch    roller 0 Dr 0 Dp 00 Wr 0   sprocket  American Standards Association
43, 000   4/8  x  1/
   pitch x width 0 Dr 0 Dp 0 range     width     ASA chains obsolete 1928-1966
43, 000   4/8  x  1/8  1/2 x 1/8″
0 7.95  3.58  3.2-3.5  2.6-2.9  bicycles (without derailleur)
42, 42H   4/8 x 3/16  1/2 x 3/16″ 7.95  3.58  4.6-5.0  3.9-4.3  heavy duty bicycles 

25, 25H 2/8  x  1/8  x  1/8  roller 0 Dr 0 Dp 00 Wr 0   sprocket  American National Standards Institute
25, 25H 2/8  x  1/8
pitch x width 0 Dr 0 Dp 0 range     width     ANSI chains   1969-on

25, 25H 2/8 x 1/8 0= 1/4 x 1/8 0 3.30  2.31  0.0-0.0  0.0-0.0  5=bushed  scooters, cam chains
35, 35H 3/8 x 3/16 = 3/8 x 3/16  5.08  3.18  0.0-0.0  0.0-0.0  5=bushed  scooters, mini-bikes
41, 000 4/8 x 1/4 0= 1/2 x 1/4 0 7.77  3.58  0.0-0.0  0.0-0.0  1=roller light gates, mini-bikes
40, 000 4/8 x 5/16 = 1/2 x 5/16  7.92  3.97  0.0-0.0  0.0-0.0  0=roller std  industrial
50, 000 5/8 x 3/8 0= 5/8 x 3/8 0 10.2  0.00  0.0-0.0  0.0-0.0  0=roller std  industrial
60, 000 6/8 x 1/2 0= 3/4 x 1/2 0 11.9  0.00  0.0-0.0  0.0-0.0  0=roller std  industrial

04B    = 000  pitch x width 0 Dr 0 Dp 0   Wr  0 sprocket  International Standards Organization
04B    = 000 
pitch x width   Dr 0  Dp    range 0
width 0 I.W 0 OW   ISO chains  

04B    = 0000  M6  x 2.8 0 4.00  1.85  2.8-0.0  0.0-0.0  0.00  0.00  roller     scooters, cam chains
04C    00= 25  1/4 x 1/8 0 3.33  2.31  3.2-0.0  0.0-0.0  0.00  0.00  bushed  scooters, cam chains
04MA 0= 25H  1/4 x 1/8 0 0.00  2.31  3.2-0.0  0.0-0.0  0.00  0.00  bushed  scooters, cam chains

05B    = 0000  M8  x 3.0 0 5.00  2.31  3.0-0.0  0.0-0.0  0.00  0.00  roller     scooters, mini-bikes

06C    00= 35  3/8 x 3/16  5.08  3.59  4.9-0.0  0.0-0.0  0.00  0.00  bushed  scooters, mini-bikes
06B    = 0000  3/8 x 7/32  6.35  3.28  5.7-0.0  0.0-0.0  0.00  0.00  roller     scooters
082    00= 00  1/2 x 3/32  7.75  0.00  2.5-0.0  0.0-0.0  0.00  0.00  roller     multi-speed bicycles

081    0= 410  1/2 x 1/8 0 7.75  3.66  3.2-3.5  0.0-0.0  0.00  0.00  roller     single speed bicycles
084    0 415  1/2 x 3/16  7.75  4.07  4.9-0.0  0.0-0.0  0.00  0.00  roller     mopeds
086    = 0000  1/2 x 3/16  8.43  0.00  5.0-0.0  0.0-0.0  0.00  0.00  roller     Jawa, bigger rollers

085    00= 41  1/2 x 1/4 0 7.77  3.59  6.3-0.0  0.0-0.0  0.00  0.00  roller     parking lot gates

08B    0
428  1/2 x 5/16  8.51  4.47  8.0-0.0  0.0-0.0  0.00  0.00  roller     motorcycles
08MC = 428H  1/2 x 5/16  0.00  4.47  8.0-0.0  0.0-0.0  0.00  0.00  roller     motorcycles

T8F    = 000  pitch x width   Dr 0  Dp Wr 00 sprocket  I.W 0 OW   Other chains
T8F    = 0000  M8  x 3/16  4.7?  3.25  4.8-0.0  0.0-0.0  0.00  0.00  roller      scooters, pocket bikes

 

Chain replacement: When there is nothing else close to the chain except the sprocket teeth, the three blue dimensions, pitch, width, and roller diameter are all that matter for replacing an entire chain (and the number of links). These are related to the places that touch the sprocket. If the 3 blue items on the replacement chain are the same, it will fit the same sprockets.

The exceptions are when there are other things close to the chain. On some Chinese bicycle engines with a 415 chain, the engine case is very close to the chain. A 415H replacement chain is wider, scrapes the side of the engine causing damage and breakage. On vintage Motobecane mopeds there are rubber bands on the front sprocket that interfere with a 415H, preventing it from sitting all the way into the valleys. When those are in place a 415H does not mesh well. It sounds and feels terrible. Once the rubber bands are removed a 415H replaces a 415 perfectly. See Chain Service below.

Link replacement: For replacing a master link or one or more individual links, more things matter: inner width, pin length and pin diameter. On modern chains these 3 red items are standardized. But for vintage 1970’s and 80’s chains they were not. Often several different chains interchange (fit the same sprocket), but have different pin diameters, pin lengths, and plate thicknesses. So while the entire chain interchanges, the individual links do not. For example, a vintage Puch master link would not fit a vintage Garelli chain (because the pin is too thick). But an entire Puch chain would replace an entire Garelli chain. 

Measuring: Chains for mopeds, motorized bicycles, gas or electric scooters, mini-ATVs, go-karts, mini-cars, and mini-bikes are not on most application charts. For these oddball vehicles you have to determine the chain size by measurement with a digital calipers, and counting how many link pins.

Metric and Inch Some Chinese made scooters and pocket bikes have 04B chains (6 mm pitch) instead of 25 (6.35 = 1/4″). Some have T8F or 05B chains (8 mm pitch) instead of 35 (9.53 = 3/8″). Metric chains look the same but don’t interchange with inch chains. 

H versions: The H (heavy duty) versions fit the same sprocket but have thicker wider plates and thicker longer pins. So a 415 master link won’t fit a 415H chain (because the pins are too short), and a 415H master link won’t fit a 415 chain (because the pins are too thick).

 


2. Moped Chains

 

Chains Oct 2012

  size 0 Dp  x I.W color  links price   part# item# master Dp x OW    says     modern replacements ½” pitch
O0
42  3.58 x 6.9 black   96L $20.0 TYC-96 xx  0    2d 3.58 x 7.2    TYC 42 xsome bike motors, Peugeot 102
O042  3.58 x 6.9 black 100L $22.0 TYC-100 x  0    2d 3.58 x 7.2    TYC 42 xsome bike motors, Peugeot 102
O041  3.58 x 8.9 black   90L $20.0 41-90 xxxx      3a 3.58 x 9.2    MAX 41industrial American mini-bikes
O041  3.58 x 8.9 black   98L $20.0 41-98 xxxx      3a 3.58 x 9.2    MAX 41industrial, American mini-bikes
O041  3.58 x 8.9 black 240L $45.0 41-240 xxx      3a 3.58 x 9.2    MAX 41industrial, parking lot gates
415H  3.93 x 8.0 black   90L $18.0 415H-90  22     3e 3.93 x 8.5    KMC    xEuro mopeds, most pre-08 Tomos
415H  3.93 x 8.0 black   91L $21.0 415H-91  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   92L $18.0 415H-92  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   93L $21.0 415H-93  22     3e 3.93 x 8.5    KMC    xEuro mopeds, most 08-on Tomos
415H  3.93 x 8.0 black   94L $18.0 415H-94  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   95L $21.0 415H-95  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   96L $18.0 415H-96  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   97L $21.0 415H-97  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   98L $15.0 415H-98  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black   99L $18.0 415H-99  22     3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 100L $20.0 415H-100  2   3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 101L $23.0 415H-101  2   3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 102L $20.0 415H-102  2     3e 3.93 x 8.5    KMC  x  European mopeds
415H  3.93 x 8.0 black 103L $23.0 415H-103  2   3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 104L $20.0 415H-104  2     3e 3.93 x 8.5    KMC  x  European mopeds
415H  3.93 x 8.0 black 105L $23.0 415H-105  2   3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 106L $20.0 415H-106  2     3e 3.93 x 8.5    KMC  x  European mopeds
415H  3.93 x 8.0 black 107L $23.0 415H-107  2   3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 chro.   98L $20.0 16096-98 23    3e 3.93 x 8.5    KMC  x  European mopeds
415H  3.93 x 8.0 chro. 110L $25.0 16096-110 0    3e 3.93 x 8.5    KMC    xEuropean mopeds
415H  3.93 x 8.0 black 110L  N/A.0 340360 A xx    3e 3.93 x 8.5    RK    x   European mopeds
415H  3.93 x 8.0 black 122L  N/A.0 491200 xx 0    3e 3.93 x 8.5    CIC    x  European mopeds
O420  3.93 x 9.4 black 120L $25.0 420-120          4b 3.93 x 9.8    plain    xAsian mopeds
O420  3.93 x 9.4 black   84L $18.0 RK 420 x 25    4b 3.93 x 9.8    RK      x Asian mopeds
O420  3.93 x 9.4 black 108L $24.0 Tsu420 xxx0    4b 3.93 x 9.8    Tsubaki  Asian mopeds
428H  4.45×12.0 black 120L $27.0 RK428H xx     0o  4.45×12.5   RK   xx   small motorcycles

  size  Dpin x I.W color  links price  name/photo master Dp x OW    says      vintage originals ½” pitch
O415  3.87 x 8.0 black 102L  N/A.0 Iris xxxxxx     3b 3.87 x 8.4    Iris xxxx Derbi 1970’s original NOS
O415  3.87 x 8.0 copp. 106L $65.0 Iris race  24    3b 3.87 x 8.4    Iris xxxx Derbi 1980’s racing chain
O415  3.87 x 8.4 black   90L $35.0 Regina 415     3c 3.87 x 8.7    Reg. 415Tomos 1980’s original NOS
O415  3.93 x 7.5 black   88L $40.0 Sedis xxxxx    3d 3.93 x 7.9    Sedis xxPeugeot 1970’s original NOS
O415  4.05 x 7.7 black   92L $35.0 Wcirc92 xx     4e 4.05 x 7.9    W-circled Tomos 1970’s, others
O415  4.05 x 7.7 black   98L $40.0 Wcirc98  x      4e 4.05 x 7.9    W-circled Tomos 1970’s, others
O415  4.05 x 7.7 black 100L $40.0 Wcirc100 x     4e 4.05 x 7.9    W-circled Flying Dutchman, others
O415  4.05 x 7.9 black   77L $25.0 RegExtra x     5a 4.05 8.2-8.6 Reg Extra Italian 1970’s (has half link)
O415  4.05 x 8.2 black   90L $28.0 Regina x        5b 4.05 8.7-9.0 Regina xx Tomos 1970’s
O415  4.05 x 9.0 black   95L $35.0 RegHD xx       5c 4.05 9.2-9.4 Reg Extra Italian 1970’s (has half link)
O415  4.05 x 9.0 black 100L $65.0 Union xxx       5c 4.05 9.2-9.4 Union   x  Puch 1970’s original NOS
O415  4.14 x 9.2 nickel  96L $45.0 ČZ xxxxxx      6a 4.14 x 9.6    ČZ xxxx   Tomos 1990’s original NOS

 

 


3. Master Links

 #  type x Dpin x OW      size          price        1/4″ pitch
1a master 2.29 x 5.0 ANSI 25        $3.00 #25

 #  type x Dpin x OW      size          price        3/8″ pitch
1b master 3.57 x 7.7 ANSI 35        $3.00 #35
1c ½ link  3.57 x 7.7 ANSI 35        $3.00 #35
1d master 3.57 x 7.7 ANSI 35-2     $4.00 #35 double row

 #  type x Dpin x OW      size          price        1/2″ pitch
1e master 3.57 x 5.0 1/2″ x 3/32″ $1.50 10 speed bicycle thin
2a master 3.57 x 5.8 410 clipless   $1.00 flex to unlock

2b master 3.57 x 5.8 410(ASA 43) $2.00 #410 bicycle clip type
2d master 3.57 x 7.2 ASA 42          $6.00 Peugeot 102
2e ½ link  3.57 x 7.6 ASA 42H        $3.00
3a master 3.57 x 9.2 ANSI 41        $3.00 

3b master 3.87 x 8.3 415 Iris xxx   $7.00 Motobecane, Derbi original
3c master 3.87 x 8.7 415 Regina x  N/A    Tomos 80’s
3d master 3.93 x 7.9 415 Sedis xx  $5.00 Peugeot 103 original
3e master 3.93 x 8.5 415H xxxxx   $3.00 2004-later Tomos original
3e master 3.93 x 8.5 415H chrome  N/A    fits 1990-later
3e ½ link  3.93 x 8.5 415H xxxxxx  $3.00 fits 1990-later
4a master 3.96 x 8.8-9.2 415 Reg.  $8.00 h.d Regina Extra
4b master 3.93 x 9.8 420 xxxxxxxx $3.00 wider than 415 or 415H
4b ½ link  3.93 x 9.8 420 xxxxxxxx $5.00 thinner than 420H or 40
4d master 3.93 x 11.1 ANSI 40 xxx $5.00 40 also fits 420H
4e master 4.05 x 7.9 415 W circled $5.00 70s -80s Tomos original
5a master 4.05 x 8.2-8.6 415 Reg.  $5.00 Italian  “Regina Extra”
5b master 4.05 x 8.7-9.0 415 plain $5.00 original chain
5c master 4.05 x 9.2-9.4 415 Union $8.00 Puch, Regina Extra HD
5d master 4.14 x 8.4 415 plain xxx $2.00 Indian some say TYC 415
5e master 4.14 x 8.4 415 plain xxx $10.0 bag of 10
6a master 4.14 x 9.4 415 W circled $6.00 late 1980’s Tomos 
6a master 4.14 x 9.6 415 “ČZ” xxxx N/A    late 90’s-early 00’s Tomos
6c master 4.42 x 9.2 Jawa xxxxxxx $4.00 Jawa – thicker pin & roller
6d master 4.43 x 11.4 428 xxxxxxx $5.00 small motorcycles
O

Master Links Cabinet

 

 

At left is Myrons Mopeds master link cabinet, full of master links and half links from 20 other moped shops that closed in the late 1980’s in Southern California. Each of the drawers contains about 10 to 100 links. Each link was measured carefully and/or put through this gauntlet of Go/NoGo gauges, which are the actual master links and corresponding inner links contained in each drawer. From left to right, the order is smallest pitch first, smallest pin first (for that pitch), and the smallest inner width first (for that pitch and pin). Inner width for a master link is the space between the inside of the outer plates, which is slightly greater than the inner width for the chain, as in the chart below.

Notice that there are no “international” master links, like 04B (6mm) or 05B (8mm). These chains did not appear in California until the late 1990’s with the stand-up scooters, pocket bikes, and electric bikes and scooters, mostly from China.

 

 

 

 

 

 


4. Chain Service

 

How to install and remove master links.

How to install and remove master links.

 

 

 

 

 

 

 

 

 

 

Motobecane:  1970’s-1980’s Motobecane Mobylette 40, 50, or 50V mopeds, the front sprocket behind the large pulley has some rubber rings that interfere with modern 415H chains. Fortunately the two 1 1/4 inch rubber rings, one on each side of the sprocket, which can be removed with something like a curved dental pick. This issue of a chain not meshing because of  (unecessary) rubber noise dampener rings contacting the outer plates instead of the sprocket contacting the rollers, also occurs on Peugeot, but not as much.

MB Front Sprockets With Rubbers

Motobecane front sprockets with rubber rings.
Left, the original IRIS chain, meshes correct.
Right, modern 415H, with taller plates,
rides up too high and does not mesh.

Motobecane front sprockets without rubbers.

Motobecane front sprockets without rubbers.
Left, the original IRIS still meshes good.
Right, the 415H meshes good now.
The end roller is cut away to see the fit.

 

 

 

 

 

 

 

 

 

 

Peugeot 103: Sometimes the newer “H” rated chains do not fit until after the bike is rode for a few minutes. The two rubber rings on either side of the original sprocket interfere with the larger outer plates on the 415H chain, causing the chain to run higher and not mesh well. After riding awhile the chain noise gets less, as the rubbers get squished and interfere less. Still, it is better to remove the pulley, and remove the rubber rings, shown at right, to have a smooth running chain.

Peugeot 102 front sprocket with original rubber rings. 415H chain does not mesh.

Peugeot 102/103 front sprocket with original rubber rings. 415H chain does not mesh.

Peugeot 102 front sprocket with rubber rings removed.

Peugeot 102/103 front sprocket with rubber rings removed. 415H wraps around fully.

Peugeot 102: This is the only US-model moped that uses a 42 chain, same sprocket as a 415 (1/2 x 3/16), but lighter duty (thinner pins, thinner and smaller plates). Sedis made both 415 chain for Peugeot 103, and 42 chain for the lighter weight Peugeot 102. Old Sedis chains are often cracked. Then they break/throw the chain. No fun. To use a modern 415H chain, the two rubber rings on either side of the sprocket must be removed, or it won’t mesh properly. See photos at right.

Motorized Bicycles 415 – Only Kind: Certain modern motorized bicycle gas engine kits use a 415 chain that passes very close to the engine case on both sides. These do not have enough room for the wider-on-the-outside 415H. They require a 415.

Motorized Bicycles:  415 and 410 Mixed: Certain modern motorized bicycle gas engine kits have a wide engine sprocket for 3/16 and a thin rear sprocket for a 1/8 chain. A 415 or 415H chain works but would be expected to have less retention (it would come off easier).

Motorized Bicycles:  Long Chain Runs: Motorized bicycles with long chain runs need chain guides and/or chain tensioners, or else the chain comes off when it slaps going over bumps, or when the frame or wheel flexes, or when the engine mounts shift/slip. The kits don’t usually come with any.

American Made Minibikes: There were many different manufacturers of minibikes back in the 60’s and 70’s but most of them used either a 35, 40, 0r 41 chain. Number 35 was used on most all 4-5-6 inch wheel minibikes while 41 was used on larger minicycles such as Rupp Roadster II and Speedway. Number 41 chain will not run on a number 40 sprocket. Number 40 chain will run on a number 41 sprocket but it will be wider than needed.

Fun Karts and Minibikes: Many chains have the chain size stamped directly on the chain links. #35, 40, 41 and 420 chain are used in the Fun Kart and Mini Bike industry. An 11 or 12 tooth clutch sprocket usually indicates the use of #35 chain. 10 tooth clutch sprockets usually indicate the use of #40, 41 or 420 chain.

More about ANSI chains:   http://chain-guide.com/applications/1-1-1-ansi-roller-chains.html

More about sprockets:  http://www.gizmology.net/sprockets.htm

More about International chains:  http://www.renold.com/Support/ChainInformationCentre/Chain_Standards.asp

 Why all of this madness about chains?   All through the 1970’s and 1980’s when you needed a master link for your moped, you had to get it from a dealer that sold that kind, or else you had to bring in your chain and hope they could find one that fit. If you had a Motobecane and you needed a master link, you could not get one from a Puch dealer, even if you showed them your chain. Their master links had thicker pins. For decades, owners have been frustrated when they bought a #415 master link for their chain, and it did not fit. That’s because there are 18 or so different 415-compatible chains. By the 1990’s no moped shop sold master links, instead they made you buy a whole chain. Thankfully, there is much better standardization in this century, in moped chains. But there are still a lot of older moped chains and substitutes that are all different. So it’s still not possible to tell (guess) what master link a customers moped needs over the phone. Some things never change… 

   

 


5. Myrons Chain List

Scan up and down the chart looking for similarities. Notice how the pitch P, and roller width W, and roller diameter D, can be the same for many different chains. Too bad the pin diameter A can vary with the maker. Ouch. A pin too big won’t fit. A pin too small will fit, but will be loose. The only way to get the correct master link is by knowing the pitch P, roller width W, roller diameter D,  inner width W+2*T, and pin diameter A.

######### ##### ################################### ####### #########################
Wire Gauges    MYRONS COMPLETE CHAIN SIZE CHART made from many charts combined
BS10=3.25mm                 by Shaun Strahm  Feb 2013
US10=3.57 Chain  ANSI     ISO std      JIS std      BS
BS 9= 3.66   ISO=  International Organization of Standardization ####### #########################
US 9= 3.97   ANSI  American National Standards Institute bush B29.1   ISO 1395   JIS B1801
BS 8= 4.06   ASA  American Standard Association (old name) roller B29.1   ISO 606     JIS B1801
US 8= 4.37   BS =  British Standard or “Metric Chain” heavy use B29.1   ISO 3512
BS 7= 4.47   JIS =  Japanese Industrial Standards bicycle          ISO 9633   JIS D9417   BS 228
US 7= 4.76   JCAS  Japan Chain Association Standards motorcycle          ISO 10190  JCAS 1     BS 6715
BS 6= 4.88   DIN=  Deutsches Institut für Normung ####### #########################
US 6= 5.16  ISO 606 (DIN 8187) is European
 ANSI B29.1 (DIN 8188) = American
######## #### ################################ ####### #########################
           (dimensions in millimeters)       calcd master link
 Chain  A#   chain   roller   roller   pin   plate  inner  outer max     min         quotes = directly measured
  Size  or    pitch   width   diam  diam  thick  width  width pin    inner         ? = estimate or guess
 P x W ISO#  JIS#     P        W        D        A       T    W+2T     R dia  width Std   Source      Application/Notes
######## #### ################################ ####### #########################
CHAIN SIZE   #    pitch   width   roller   pin   plate  inner  outer master link     S M A L L E R      C H A I N S :
3/16x 3/32 03C 15      4.76   2.38   4.00   1.85   0.60   3.78   6.80 ISO   hzpt.com       industrial
M5 x 2.5 03B           5.00   2.50   3.20   1.49   0.60   3.70   7.40 BS/DIN beijingthc.com
M6 x 2.8 04B           6.00   2.80   4.00   1.85   0.60   4.00   7.40 BS/DIN beijingthc.com
M6 x 2.8 04B           6.00   2.80   4.00   1.85   0.60   4.00   6.80 BS    hzpt.com       industrial
M6 x 2.8 04B           6.00   2.80   4.00   1.83   0.61   4.02   6.30 BS    Allied-Locke   industrial
1/4 x 1/8 04C 25      6.35   3.18   3.30   2.30   0.75   4.68   7.60 ANSI hzpt.com   (bush, not roller)
1/4 x 1/8 04C 25      6.35   3.18   3.30   2.29   0.76   4.70   7.92 ANSI Diamond   (bush, not roller)
1/4 x 1/8 04C 25      6.35   3.18   3.30   2.28   0.76   4.74   8.64 ANSI docstoc.com  (bush, not roller)
1/4 x 1/8 04C 25      6.35   3.18   3.30   2.30   0.75   4.68   8.60 ANSI chainsprocketpulley.com
1/4 x 1/8 04C 25      6.35   3.28   3.25   2.27   0.80   4.60   7.95 ANSI “25” direct measure
1/4 x 1/8 04MA 25H    6.35   3.18   3.30   2.30   1.00   5.18   8.90 ANSI mdmetric.com (bush)
1/4 x 1/8 04MA 25H    6.35   3.18   3.30   2.30   1.00   5.18   9.00 ANSI hzpt.com   (bush, not roller)
1/4 x 1/8 04MA 25H    6.35   3.22   3.25   1.99   1.00   5.22   8.95 ANSI “DID 25SH”
1/4 x 1/8 04MA 25H    6.35   3.28   3.25   2.0?   1.00   5.18   8.95 ANSI “25H” (PC50 cam chain 42L)
M7.8 x 4.7 05MA 219    7.77   4.68   4.59   3.00   1.20   7.08   11.5 JCAS mdmetric.com (bush)
M8 x 3.0 05B           8.00   3.00   5.00   2.31   0.80   4.60   8.20 BS    hzpt.com       industrial
M8 x 3.0 05B           8.00   3.00   5.00   2.31   0.75   4.50   8.2? BS/DIN beijingthc.com
M8 x 3.0 05B           8.00   3.2      5.00   2.3     0.75   4.7   8.2? BS/DIN ocm.co.jp  industrial
M8 x 4.7 05T           8.00   4.70   4.73   3.05   1.25   7.20   11.0 ISO   hzpt.com       industrial
M8.5 x 4.8 05MC 270H  8.50   4.75   5.00   3.28   1.80   8.35   13.3 JCAS mdmetrics.com (bush)
3/8 x 5/32 old     9.53   4.00   6.28   3.23   1.25   6.50   10.9      “W” circled    (roller) Tomos A3
3/8 x 5/32 old     9.53   4.05   6.35   3.2?   1.30   6.65   10.6   “Regina Extra” (roller) Tomos A3
3/8 x 3/16 06C 35      9.53   4.76   5.08   3.58   1.27   7.30   11.8 3.57×7.7 ANSI Diamond       (bush, not roller)
3/8 x 3/16 06C 35      9.53   4.76   5.06   3.56   1.30   7.36   11.7 3.57×7.7 ANSI “ANSI 35”  (bush, not roller)
3/8 x 3/16 06C 35      9.53   4.76   5.08   3.58   1.27   7.30   12.7 3.57×7.7 ANSI docstoc.com  (bush, not roller)
3/8 x 3/16 06C 35      9.53   4.85   5.10   3.6?   1.35   7.55   11.9 3.57×7.7 ANSI “Regina ASA 35” (bush)
3/8 x 3/16 06C 35      9.53   4.99   4.99   3.6?   1.10   7.19   11.7 3.57×7.7 ANSI “KMC 35” (bush) Tomos A35/55
3/8 x 7/32 06B           9.53   5.72   6.35   3.28   1.32   8.36   13.4 BS/DIN ocm.co.jp  industrial
3/8 x 7/32 06B           9.53   5.72   6.35   3.28   1.30   8.32   13.2 BS    hzpt.com        industrial
3/8 x 7/32 06B           9.53   5.72   6.35   3.28   1.27   8.26   12.5 BS/DIN beijingthc.com
3/8 x 7/32 06BH           9.53   5.72   6.35   3.28   1.50   8.72   14.0 ISO   hzpt.com     industrial
3/8 x 1/4           9.53   6.35                obsolete ?
3/8 x 5/16           9.53   7.94   5.03            (bush, not roller)
3/8 x 3/8 06MA T3F    9.53   9.50   6.00   4.50   1.80   13.1   18.6        (China only) (bush)
######## #### ################################ ####### #########################
CHAIN SIZE   #    pitch   width   roller   pin   plate  inner  outer master link     B I C Y C L E   C H A I N S :
1/2×11/128           12.7   2.2?   7.75   3.6?   0.7?   3.6?   5.5 special ISO   wikipedia      bicycle 11sp Camp
1/2×11/128           12.7   2.2?   7.75   3.6?   0.8?   3.8?   5.9 special ISO   wikipedia      bicycle 10sp Camp
1/2×11/128           12.7   2.2?   7.75   3.6?   0.8?   3.8?   6.2 special ISO   KMC X10       bicycle 10 speed
1/2×11/128           12.7   2.2?   7.75   3.6?   0.9?   4.0?   6.6 special ISO   KMC Z9000   bicycle 9 speed
1/2 x 3/32           12.7   2.4?   7.75   3.58   0.9?   4.2?   7.1 special ISO   KMC Z72       bicycle 7-8 spd
1/2 x 3/32           12.7   2.4?   7.75   3.58   1.0?   4.4?   7.3 special ISO   KMC Z50       bicycle 6-7 spd
1/2 x 3/32           12.7   2.5?   7.75   3.58   1.0?   4.5?   7.8 none ISO   KMC Z30       bicycle 5-6 spd
1/2 x 3/32 082           12.7   2.40   7.75   3.63   1.0?   4.4?   8.1 none BS/DIN THC 47 beijingthc.com
1/2 x 3/32           12.7   2.45   7.70   3.57   1.00   4.45   7.5 none ISO   “Sedisport”    bicycle 5-6 spd
1/2 x 3/32           12.7   2.55   7.71   3.58   1.00   4.55   7.9 none ISO   “W.S.  7-6”   bicycle 5-6 spd
1/2 x 1/8 081         12.7   3.30   7.75   3.66   1.10   5.50   10.2 3.57×5.8 BS/DIN hangzhou bicycle 1-spd
1/2 x 1/8 43      12.7   3.40   7.75   3.63   1.02   5.40   9.4 3.57×5.8 ANSI THC 42 beijingthc.com
1/2 x 1/8 410    12.7   3.45   7.71   3.57   1.00   5.45   8.8 3.57×5.8 ISO  “TAVA  Taiwan” bicycle 1sp
1/2 x 1/8 old     12.7   3.46   7.74   3.57   0.95   5.36   9.2 3.57×5.8 ISO  “U” Union-Styria  bicycle
1/2 x 1/8 410    12.7   3.50   7.68   3.59   1.00   5.50   8.8 3.57×5.8 ISO  “KMC   Z”     bicycle 1-spd
######## #### ################################ ####### #########################
CHAIN SIZE   #    pitch   width   roller   pin   plate  inner  outer master link     M O P E D   C H A I N S :
1/2 x 3/16 42      12.7   4.80   7.77   3.63   1.02   6.84   10.8 3.57×7.2 ANSI OCM chain S Series
1/2 x 3/16 42      12.7   4.95   7.75   3.58   1.02   6.95  10.6 3.57×7.2 BS   “TYC 82D”    freight bicycle
1/2 x 3/16 42      12.7   5.00   7.74   3.57   1.02   7.00   11.1 3.57×7.2 old  “Sedis France” Peugeot 102
1/2 x 3/16 42H   12.7   5.00   7.72   3.58   1.27   7.54   12.? 3.57×8.0 ANSI “42 USA”
1/2 x 3/16 old     12.7   5.02   7.72   3.87   2.00   9.02   14.5       “Regina Extra”  h. duty Italian
1/2 x 3/16 old     12.7   5.04   7.68   3.88   1.50   8.04   13.2 3.87×8.2       “IRIS”     Derbi, Motobecane
1/2 x 3/16 415     12.7   5.02   7.72   3.89   1.70   8.42   13.8        “Regina 415” Tomos A3
1/2 x 3/16 415    12.7   5.04   7.75   3.92   1.25   7.54   11.7 3.92×7.9         “Sedis France” Peu 103, Batavus
1/2 x 3/16 415    12.7   5.03   7.71   3.95   1.25   7.53   11.8 3.92×7.9         “unmarked”  round rivets
1/2 x 3/16 415    12.7   5.05   7.73   3.96   1.25   7.55   12.2 3.92×7.9         “Sedis France” round rivets
1/2 x 3/16 415    12.7   4.88   7.75   3.96   1.30   7.48   12.5 3.92×7.9 ISO   ZHC chain     moped
1/2 x 3/16 415H  12.7   4.99   7.69   3.92   1.50   7.99   13.1 3.92×8.5 JCAS “KMC K415H”  bmx freestyle
1/2 x 3/16 415H  12.7   5.00   7.67   3.93   1.50   8.00   13.1 3.92×8.5 JCAS “C I C” Tomos A35 mid 00’s
1/2 x 3/16 415H  12.7   4.92   7.71   3.93   1.50   7.92   13.2 3.92×8.5 JCAS “RK 415H”  moped/freestyle
1/2 x 3/16 415H  12.7   4.95   7.68   3.93   1.50   7.95   13.3 3.92×8.5 JCAS “415H”  brownish color
1/2 x 3/16 415H  12.7   4.88   7.75   3.96   1.50   7.88   12.8 3.92×8.5 JCAS ZHC chain    moped
1/2 x 3/16 old     12.7   5.00   7.73   4.05   1.30   7.60   12.2 4.05×8.2        “W” circled Tomos A3 original
1/2 x 3/16 old     12.7   5.05   7.73   4.04   1.40   7.85   12.9 4.05×8.2        “Regina Extra”  Italian mopeds
1/2 x 3/16 old     12.7   5.33   7.69   4.07   1.82   8.97   14.7 4.05×9.2        “Regina (underlined)” Italian
1/2 x 3/16 084         12.7   4.88   7.75   4.09   1.80   8.48   14.8 4.05×9.2 BS    hangzhou      industrial
1/2 x 3/16 old     12.7   5.00  7.75   4.05   2.00   9.00   14.3 4.05×9.2        “Styria” Union Puch original
1/2 x 3/16 old     12.7   4.92   7.72   4.14   1.43   7.78   12.1 4.13×8.3        “unmarked”   industrial
1/2 x 3/16 old     12.7   5.11   7.72   4.14   1.90   8.91   14.5 4.13 x 9.4        “Regina (underlined)” Italian
1/2 x 3/16 old     12.7   5.35   7.68   4.14   1.90   9.15   14.5 4.14×9.6        “ČZ” silver  Tomos A35 late 90’s
1/2 x 3/16 old     12.7   4.88   7.75   4.18   1.50   7.88   12.8 4.14×8.3        chainsprocketpulley.com
1/2 x 3/16 old     12.7   5.0?   8.4?   4.43   1.4?   7.8?   14.? 4.43×9.2        “unmarked” unknown
1/2 x 3/16    086 Jawa  12.7   5.0?   8.43   4.43   1.82   8.6?   14.? 4.43×9.2        “unmarked” Jawa original
1/2 x 1/4 085 41      12.7   6.25   7.75   3.58   1.25   8.85   13.7 3.57×9.2 BS    hzpt.com     light duty
1/2 x 1/4 41      12.7   6.45   7.70   3.57   1.25   8.85   13.3 3.57×9.2 ANSI “MAX 41”   light duty
1/2 x 1/4 41      12.7   6.35   7.75   3.58   1.27   8.89   13.0 3.57×9.2 ANSI Diamond     light duty
1/2 x 1/4 08MA 420    12.7   6.35   7.75   3.96   1.50   9.35   14.5 3.92×9.7 ISO   ZHC chain   motorcycle
1/2 x 1/4 08MA 420    12.7   6.35   7.72   3.95   1.50   9.35   14.8 3.92×9.7 JCAS “EK 420”     Asian mopeds
1/2 x 1/4 08MA 420    12.7   6.35   7.74   3.93   1.50   9.35   14.7 3.92×9.7 JCAS “DID 420”   Asian mopeds
1/2 x 1/4 08MA 420H  12.7   6.35   7.75   3.96   1.80   10.0   15.7 3.92×11.0 ISO   ZHC chain   motorcycle
1/2 x 1/4 420H  12.7   6.35   7.70   3.96   2.00   10.4   17.3 3.92×11.0 JCAS EK chain      motorcycle
######## #### ################################ ####### #########################
CHAIN SIZE   #    pitch   width   roller   pin   plate  inner  outer master link     L A R G E R      C H A I N S :
1/2 x 5/16 08A           12.7   7.85   7.95   3.96   1.50   10.9   16.6 BS    hzpt.com      industrial
1/2 x 5/16 40      12.7   7.94   7.94   3.96   1.52   11.0   16.0 ANSI Diamond     industrial
1/2 x 5/16 40      12.7   7.9?   7.9?   3.92   1.5?   11.?   15.? ANSI “Japan 40”   industrial
1/2 x 5/16 08B           12.7   7.85   8.51   4.45   1.62   11.1   16.7 BS/DIN ocm.co.jp  industrial
1/2 x 5/16 428    12.7   7.97   8.43   4.45   1.50   11.0   16.4 JCAS “DMC 428”  motorcycle
1/2 x 5/16 08MC 428H  12.7   7.75   8.51   4.45   2.03   11.8   18.3 ISO   ZHC chain    motorcycle
1/2 x 5/16 08MC 428H  12.7   7.94   8.51   4.50   2.00   12.0   19.6 JCAS EK chain      motorcycle
5/8 x 1/4 10MA         15.9   6.25   10.2          2.40   11.1   18.9 ISO   mdmetric.com
5/8 x 1/4 520    15.9   6.35   10.2   5.24   2.00   10.4   18.6 JCAS EK chain      motorcycle
5/8 x 1/4 520    15.9   6.35   10.2   5.08   2.00   10.4   17.7 JCAS ZHC chain    motorcycle
5/8 x 1/4 520H  15.9   6.35   10.2   5.24   2.42   11.2   18.9 JCAS ZHC chain    motorcycle
5/8 x 1/4 520H  15.9   6.35   10.2   5.24   2.20   10.8   19.5 JCAS EK chain      motorcycle
5/8 x 5/16 525    15.9   7.94   10.2   5.08   2.03   12.0   18.7 JCAS ZHC chain    motorcycle
5/8 x 5/16 525H  15.9   7.94   10.2   5.24   2.42   12.8   20.4 JCAS ZHC chain    motorcycle
5/8 x 3/8 10A          15.9   9.40   10.2   5.08   2.03   13.5   20.7 BS    hzpt.com     industrial
5/8 x 3/8 10MB          15.9   9.40   10.2          2.00   13.4   20.9 ISO   mdmetric.com
5/8 x 3/8 50      15.9   9.53   10.2   5.08   2.03   13.6   20.1 ANSI Diamond      industrial
5/8 x 3/8 530    15.9   9.53   10.2   5.08   2.00   13.5   20.9 JCAS ZHC chain    motorcycle
5/8 x 3/8 530H  15.9   9.53   10.2   5.08   2.42   14.3   21.9 JCAS ZHC chain    motorcycle
5/8 x 3/8 530H  15.9   9.53   10.2   5.38   2.40   14.3   23.0 JCAS EK chain      motorcycle
5/8 x 3/8 532    15.9   9.53   11.1 JCAS                    (bigger roller)
5/8 x 3/8 10B           15.9   9.65   10.2   5.08 BS    Morse          industrial
5/8 x 3/8 12MA         19.1   9.40   11.9           2.40   14.2   25.9 ISO   mdmetric.com
3/4 x 3/8 630    19.1   9.53   11.9   5.95   3.20   15.9   25.2 JCAS EK chain      motorcycle
3/4 x 3/8 632    19.1   9.53   12.7 JCAS                    (bigger roller)
3/4 x 7/16 12B           19.1   11.7   12.1   5.72 BS    Morse          industrial
3/4 x 1/2 60      19.1   12.7   11.9   5.94   2.39   17.5   25.1 ANSI Diamond      industrial

 

 

 


6. Moped Chain History

Vintage Moped Chains: Vintage bikes often have obsolete chains, or they specify the size in an obsolete way. Vintage equipment used the inch size, pitch x width. Modern motorcycles all use chain model numbers, like 428, 520, 630. The above chart shows that connection. In mopeds, there are 18 different chains, all size 415, or 1/2 x 3/16. They have different pin diameters and inner widths. In modern mopeds there are about 3 or 4.

Moped Chain History: When a shop installs a new chain, they throw the leftover pieces in a box. As the years go by, layers of chains accumulate, with the oldest ones at the bottom, as long as no one mixes up the pile.  That’s one way to “date” chains. At Myrons, certain boxes of parts have been untouched since about 1985 to 1995. Only one little scrap of modern 415H chain was in that material, from those years. Not even 415H master links were in that time zone. This little scrap is what Shaun believes to be the earliest example of a 415H chain. Shown below on the Motobecane sprockets, it’s gold and  says “Taiwan”. Taiwan bicycle products and machinery blossomed in the 1980’s. China made components came out about 15 years later.

Italian Chain History: At least five different Regina chains are original on 1970’s and 80’s Italian made mopeds, two that say “Regina Extra” and three that say “Regina” underlined.  See their pictures above. They all have different master links! Craziness!

Regina pin x width   plates      name                         closest master link                 next closest 
3.96  x  9.0      2.0    Regina Extra              4a.  reg1 (3.96 x 9.2-9.5)     420H (3.93 x 9.8)
3.89  x  8.4      1.7    Regina 415                3e. 415H (3.93 x 8.5) 
4.05  x  7.9      1.4    Regina Extra              5a.  reg2 (4.05 x 8.2-8.6)     415H (3.93 x 8.5)
4.05  x  9.0      1.8    Regina (underline)     5c.  puch (4.05 x 9.2-9.4)     420H (3.93 x 9.8)
4.14  x  8.9      1.9    Regina (underline)     6a. tom1 (4.14 x 9.4-9.6)
 

Tomos Chain History: At least seven different Tomos chains have been used over the years.

Regina Underlined Tomos A3 1970's

Regina
Italy
1970’s
3.89 x 8.4

W Circled early Tomos

W Circled
Germany
late 1970’s
4.05 x 7.9

W Circled late Tomos A3

W Circled
Germany
1980’s
4.14 x 9.4

ČZ chain Tomos A35 4.14 x 9.6

ČZ chain
Slovenia?
late 1990’s
4.14 x 9.6

CIC 415H Tomos A35 early 2000's 3.93 x 8.5

CIC 415H
Taiwan?
mid 2000’s
3.93 x 8.5

plain 415H Tomos A55 2007-on 3.93 x 8.5

415H
China?
late 2000’s
3.93 x 8.5

W Circled Germany 2013-on 4.14 x 9.6

W Circled
Germany
2013-on
4.14 x 9.6

 

Above, seven Tomos chains take three different master links. The pins range from 3.89 to 4.14mm thick. The inner width ranges from 7.9 to 9.6mm. “Inner width” means measured between the inside walls of the outer plates. A wider inner link will not fit inside a narrow outer link.

First the “Regina underlined” (3.89 x 8.4) on early A3, and “W circled” (4.05 x 7.9) also on early A3, then “W circled” (4.14 x 9.4) on late A3, then ČZ (4.14 x 9.6) on A35, then CIC 415H on late A35, and now plain 415H (3.93 x 8.5) on A55 models. The chains got thicker and wider and taller on the outside, as the decades progressed. The pins got thicker, and then thinner, and now thick again: 3.89 ->4.05 -> 4.14 -> 4.14 -> 3.93 ->3.93 ->4.14. Same thing with inner width: 8.4 -> 7.9 -> 9.4 -> 9.6 -> 8.5 ->8.5 ->9.6. Perhaps this is why Tomos stopped selling master links…