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
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 0 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
size 0 Dp x I.W color links price part# item# master Dp x OW says modern replacements ½” pitch
O042 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 none 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 41 industrial American mini-bikes
O041 3.58 x 8.9 black 98L $20.0 41-98 xxxx 3a 3.58 x 9.2 MAX 41 industrial, American mini-bikes
O041 3.58 x 8.9 black 240L $45.0 41-240 xxx 3a 3.58 x 9.2 MAX 41 industrial, 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 84L $18.0 RK 420 x 25 4b 3.93 x 9.8 RK x Asian mopeds
O420 3.93 x 9.4 black 100L $20.0 420-100 4b 3.93 x 9.8 plain xAsian mopeds
O420 3.93 x 9.4 black 120L $25.0 420-120 4b 3.93 x 9.8 plain xAsian 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. 415 Tomos 1980’s original NOS
O415 3.93 x 7.5 black 88L $40.0 Sedis xxxxx 3d 3.93 x 7.9 Sedis xx Peugeot 1970’s original NOS
O415 4.05 x 7.7 black 92L $35.0 Wcirc92 xx 4e 4.05 x 7.9 Wippermann Tomos 1970’s, others
O415 4.05 x 7.7 black 98L $40.0 Wcirc98 x 4e 4.05 x 7.9 Wippermann Tomos 1970’s, others
O415 4.05 x 7.7 black 100L $40.0 Wcirc100 x 4e 4.05 x 7.9 Wippermann 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 N/A.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 428H xxxxx $5.00 small motorcycles
O
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.
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, can be removed with something like a curved dental pick. This issue of a chain not meshing because of (unnecessary) rubber noise dampener rings contacting the outer plates instead of the sprocket contacting the rollers, also occurs on Peugeot, but not as much.
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.
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 102/103 front sprocket with original rubber rings. 415H chain does not mesh.
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 pin | max min | quotes = directly measured | |
| Size | or pitch width diam diam thick width length | 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 3.6? ?.?? 13.5? 15.5 | (bush, not roller) | ||
| 3/8 x 3/8 | 06MA | T3F 9.53 9.50 6.00 4.50 1.80 ??.? 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!
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.
Italy 1970’s 3.89 x 8.4
Germany late 1970’s 4.05 x 7.9
Germany 1980’s 4.14 x 9.4
ČZ chain Slovenia? late 1990’s 4.14 x 9.6
CIC 415H Taiwan? mid 2000’s 3.93 x 8.5
415H China? late 2000’s 3.93 x 8.5
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 Wippermann (4.05 x 7.9) also on early A3, then Wippermann (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…