Kreidler made in Germany by Kreidler Kreidler 2-speed engine
Contents: 1. Kreidler Models 2. Engine Parts
Contents:03. Speed Versions 4. Frame Parts
Kreidler Racers
1. Kreidler Models
Kreidler (pronounced Kr-EYE-d-lur) was founded in 1903 as “Kreidlers Metall- und Drahtwerke” (Kreidlers metal and wire factory) by Anton Kreidler. Motorcycle production began in 1951. By 1959, one third of all German motorcycles were manufactured by Kreidler. Visit the Kreidler Museum at http://www.kreidler-museum.de/
In the 1960’s and 70’s Kreidler became very successful in 50cc motorcycle road racing. With riders Hans-Georg Anscheidt, Jan de Vries, Henk van Kessel, and Eugenio Lazzarini, they were FIM World Champions in 1961, 1971, 1973, 1974, 1975, 1978, 1979, 1980, 1981, and 1982. Those racing Kreidlers were not mopeds (except the very first one), but they did have the same size pistons: tiny. In 1974 Henk van Kessel did a lap around the Belgian Gran Prix at an average speed of 101.7mph. That is unbelievably fast. Read about 120 mph super-high-rpm 50cc road racers at http://www.elsberg-tuning.dk/50ccroadracing.html Now from one extreme to the other, 120 mph 50cc to 20 mph 50cc:
Mofas and Mopeds In Germany there are two kinds of mopeds:
Mofas are 25 km/h (16 mph), no licence required, minimum age 15, no passengers. 
“Mofa” is short for motorisertes fahrrad (motorized bicycle).
Mopeds are 40 km/h (25 mph), drivers license required (any class), minimum age 16. “Moped” is short for motor mit pedale (motor with pedals).
In the 1950’s and 60’s they used the name “Florett” for everything, motorcycles, mopeds, and mofas. From 1969 to 1982, Kreidler mofa models had the prefix MF, while moped models had prefix MP. In the 1970’s the name “Florett” was for top tank motorcycles, mostly 50cc 5-speed. Starting in 1976 the name “Flory” was used for step-thru mopeds and mofas, both automatic 2-speed and manual grip-shift 2-speed types, and “Flott” was for top-tank mopeds.
1972-75 Kreidler MF 2 mofa
Zwei gäng Automatik 50
1972-75 Kreidler MP 2 moped
same as export version MP 7
Zwei gäng Automatik 50
1976-78 Kreidler Flory 12
Zwei gäng manuell 50
Kreidler MP 9 Flory moped was the export-to-USA version of a German-model MP 2. Other MP 2 export (non-German) versions worldwide include MP 6, MP 7, and MP 8. Some things are the same. The MP 9 air filter has “MP 8” molded into it. The MP 9 parts price list uses the term “MP 7” for those parts used only on the more restricted MP 9 models. See below “USA Speed Versions”.
Kreidler USA p1
Kreidler USA p2
Kreidler USA p3
Kreidler USA p4
Kreidler MP 9
Another ZA: The Kreidler two speed automatic (Zwei gäng Automatik) is like a Puch, Garelli or Tomos two speed, with two centrifugal automatic clutches, in a transmission oil bath compartment, one that gets the bike moving forward, and another that lets it shift automatically between first and second (low and high) gear, according to the rear wheel speed. Roughly speaking, below 15mph it’s in first gear and above 15mph it’s in second gear.
Engine Service: Here is a link to the 1976 engine “Assembly Disassembly Instructions” manual.
http://projectmopedmanual.info/Manuals/Kreidler/Kreidler%20service%20manual.pdf
This beautiful illustration of an early 1970’s engine is from the 1976 service manual “Assembly Disassembly Instructions”. The front of the engine is facing into the page and to the left. In the views below the front is facing out of the page and to the right. So both the front and the back side of each part are shown, here or there.
2. Engine Parts
Parts specific for 17 and 20 mph versions ore orange.
fig qty part # price description
A1 1 215.00.12 none engine with normal gaskets, 12T
A1 1 215.00.17 none engine with restricted gaskets, 12T
A2 1 000.00.77 $2.00 hex head screw M8 x 60
A3 2 000.40.67 $0.50 toothed lock washer M8
A4 2 000.20.16 $0.50 hex nut M8
A5 1 000.10.09 $2.00 hex head screw M8 x 65
A6 1 215.09.22 none back square
fig qty part # price description
B1 1 215.01.35 none housing left
B2 1 215.01.27 none housing center
B3 1 215.01.03 none housing right
B4 1 2150118A $8.00 center case gasket
B5 1 215.01.10 $8.00 trans. cover gasket
B6 2 000.63.01 $30.0 crankshaft bearing BO15 3-piece
B7 1 001.00.35 $10.0 cover bearing 6202/C3
B8 2 000.60.32 $6.00 cover bearing 6001
B9 1 001.00.11 $9.00 seal ring 15 x 25 x 5
B10 1 001.00.25 $6.00 seal ring 15 x 24 x 7 double lip
B11 4 000.22.02 $5.00 cylinder stud M6 x 106 (92 exposed)
B12 1 011.00.19 none check plug M12
B13 1 000.19.60 none drain plug M12-1.5
B14 2 000.70.08 none ring seal C12 x 16
B15 4 215.01.12 none fitting bushing
B16 7 000.16.00 none oval head sunk screw M6 x 30
B18 4 000.16.20 none oval head sunk screw M6 x 45
B19 5 000.17.46 none fillister head screw M6 x 50
B20 2 000.70.08 none ring seal C6 x 10
B20 3 000.43.57 none lock washer B6
B21 1 215.09.21 none magneto cover
B22 3 000.16.22 none oval head sunk screw M4 x 40
B23 6 001.00.22 none dished washer M4 (2 per screw)
B24 1 215.01.13 none clutch shaft
B25 1 215.01.14 none spacer
B26 1 001.00.14 none o-ring 20 x 2.5
B27 1 215.01.83 none clutch lever
B28 1 000.11.13 none hex head screw M6 x 12
B29 1 000.43.57 none lock washer 6
B30 1 000.30.02 none washer 6.4
B31 1 215.09.09 none return spring
fig qty part # price description
C1 1 2150388C none cylinder with piston
C1 1 215.03.88 none cylinder only
C2 1 215.03.83 see pistons Ø12 pin, 19 tall
C3 1 215.03.08 none piston pin Ø12 x 32.8
C4 2 000.90.07 $10.0 piston ring 40 x 1.5 GI
C5 2 000.45.02 $2.00 piston pin clip Ø12
C6 1 215.03.43 none cylinder head
C7 1 215.03.44 $9.00 head gasket 0.7 mm
C7 1 215.03.30 none head gasket MP 7 thicker
C8 1 215.03.12 $6.00 base gasket 0.25 mm
C9 1 215.03.20 none intake pipe
C10 1 215.03.25 $6.00 intake gasket bigger I.D.
C10 1 215.03.06 none intake gasket MP 7 smaller
C11 2 000.10.52 none hex head screw M6x32
C12 2 000.43.57 none lock washer B6
C13 1 215.03.45 none decompression valve
C14 1 000.70.14 $2.00 decomp seal washer 10 x 13.5 (13.8)
C15 4 215.03.16 $0.30 head nut M6
C16 4 000.30.02 $0.20 head washer 6.4
C17 1 008.11.03 $5.00 spark plug W175T1 (NGK BR6HS)
C20 1 215.35.00 none crankshaft
C21 1 215.35.01 none connecting rod
C22 1 001.00.32 none needle bearing top 12 x 15 x 15
C23 1 001.00.17 none needle bearing bottom
C24 2 215.05.07 none spacer washer
C25 – 215.05.08 none shim washer 0.10 as required
C25 – 215.05.09 none shim washer 0.15 as required
C25 – 215.05.10 none shim washer 0.20 as required
C26 1 000.80.03 $2.00 flywheel key M81 2 x 3.7
fig qty part # price description
0D1 1 215.06.16 N/A shaft
0D2 1 215.06.81 N/A gear 92 teeth
0D3 1 215.06.17 N/A pawl carrier
0D4 1 215.06.06 N/A pawl
0D5 1 215.06.07 N/A wire ring spring
0D6 1 215.06.02 N/A gear 87 teeth
0D7 1 215.06.18 N/A key
0D8 1 215.06.19 N/A spacer bush
0D9 – 015.06.09 N/A shim washer 0.1 as required
0D9 – 015.06.12 N/A shim washer 0.3 as required
0D9 – 015.06.13 N/A shim washer 0.5 as required
D10 1 215.09.29 N/A sprocket 12 teeth
D11 1 215.09.30 N/A spacwer bush
D12 1 001.00.36 N/A ring seal 14.75 x 1.5
D13 1 000.47.50 N/A tab washer Ø12
D14 1 000.20.52 N/A hex nut M12-1.0 x 6 hex19
D15 2 000.46.60 N/A snap ring 15 x 1
D16 – 2150911K N/A automatic transmission fluid 330cc
fig qty part # price description
0E1 1 215.07.81 N/A clutch drum with pinion 12T
0E2 1 001.00.18 N/A needle bearing 10 x 13 x 10
0E3 1 215.07.02 N/A pinion 18 teeth
0E4 1 001.00.29 N/A needle bearing 13 x 17 x 20
0E5 1 215.07.22 N/A spacer
0E6 1 215.07.14 N/A thrust washer
0E7 1 215.07.82 N/A clutch I complete
0E8 1 215.07.85 N/A clutch II complete
0E9 3 215.07.88 N/A centrifugal weight II
E10 1 215.07.92 N/A hub II complete
E11 3 215.07.21 N/A damping segment
E12 1 215.07.09 N/A bracing spring
E13 3 215.07.90 N/A riveted locking block
E14 3 215.07.26 N/A guide shackle
E15 3 001.00.21 N/A lock spring
E16 1 215.07.18 N/A disengaging spring
E17 1 215.07.19 N/A supporting ring
E18 1 000.60.52 N/A ball bearing 16006
E19 1 000.45.20 N/A circlip 26
E20 – 015.06.09 N/A shim washer 0.1 as required
E20 – 015.06.12 N/A shim washer 0.3 as required
E20 – 015.06.13 N/A shim washer 0.5 as required
’81 parts price list
’76 parts catalog
3. 1976-81 U.S. Speed Versions
The 1977 MP 9 and MP 19 owners manual says there were four speed versions offered, 17, 20, 25, and 30 mph, for different US states. But none of Myrons Mopeds’s Kreidler brochures or manuals, parts, service or owners, say specifically what parts are on each speed version. The parts catalog is only for 30 mph.
Here is what can be learned from the Kreidler of America, Inc. 1981 Parts Price List and the Kreidler Werke GMBH 1976 Catalog of Spare Parts for MP-9 USA. The carburetor size is always the same 12mm, either early metal-tip-float-needle 1/12/260, or late rubber-tip 1/12/268 which superseded it. There is no other carburetor anywhere in the 1981 USA price list. Other similar Kreidler mopeds and mofas worldwide have 10mm carburetors, such as 1/10/105 or 1/10/126. Besides there being only one carburetor, there is also only one cylinder, one piston, one head, one kind of internal gears, and one intake pipe.
So in the parts price list and catalog, only these four things are different:
Exhaust can be normal 215.23.99 with straight muffler 15.23.74B
Exhaust ca or restricted 215.23.89 with turned-up muffler 15.23.64B
Exhaust The head pipe, rear cone, and baffle are all the same.
Intake gasket can be small or big, Ø10 215.03.06 (MP 7) or Ø12 215.03.25 (MP 9)
Head gasket can be thick or thin, 8.5:1 CR 215.03.30 (MP 7) or 10:1 215.03.44 (MP 9)
Rear sprocket can be big or small, 38T 265.02.12 or 36T 265.02.11 or 36T 265.02.11A
Assuming that the equipment that came on the bikes was in the price list, the speed version differences can be guessed. The guesses are shaded light grey.
30 mph has normal exhaust, big intake gasket, thin head gasket, small rear sprocket
25 mph has restricted exhaust, big intake gasket, thin head gasket, small rear sprocket
25 mphh or normal exhaust, small intake gasket, thick head gasket, small rear sprocket
20 mph has restricted exhaust, small intake gasket, thick head gasket, small rear sprocket
17 mph has restricted exhaust, small intake gasket, thick head gasket, big rear sprocket
All of the other parts on the bike are the same for all speed versions.
4. Frame Parts
0F1
0F2
0F3
0F4
0F5
0F6
0F7
0F8
0F9
F10
F11
F12
F13
F14
F15
F16
F17
F18
F19
F20
F21
F22
F23
F24
F25
F26
F27
F28
F29
F30
F31
F32
F33
F34
F35
F36
F37
F38
F39
F40
F41
F42
The swing arm bushings #2, one on each side, often wear out. The loose swingarm pivot then causes some rear-wheel steering, which makes the bike wobble or weave. There are no replacements available, so far. Here are some dimensions (mm):
swing arm inner space is 81.5, frame outer is 76.0, pivot bolt is 13.95
original bushing: 14.2 ID, 17.35 OD, with a lip 22 by 2.5, brass replacement: 14.1 ID, 17.1 OD
A tube 14.2 x 17 x 76.5, plus two washers 14.2 x 2.5 would be a simpler, but maybe less precise substitute.
The original material is a soft plastic. It squishes or deforms under heavy load. When installed the soft bushing shrinks from 14.2 x 17.35, to 14.0 x 17.0. A hard material like brass would not shrink. That’s why brass replacement bushings need to be slightly smaller than the originals.
Where else to get Kreidler parts
Kreidlerparts.com in Germany https://www.kreidlerparts.com/
They have most things. They can take a month or more for handling and shipping.