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BMW MOTORCYCLE PARTS

• Engine
• Clutch & Transmission
• Final Drive
• Chassis & Wheels


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within the U.S.
PARTS: Clutch & Transmission

PRICE
BMW Motorcycle TRANSMISSION SEALS AND GASKETS
Either Viton (trademark of DuPont Dow Elastomers) or Nitrile with a coated outside diameter to help it seal in the bore. Viton is much more resistant to heat and age-hardening than Nitrile, but more expensive. The kickstart and shift seals are double lip to help keep dirt out, the input and output are only single lip to avoid the high heat generated by the second poorly lubricated lip. 		 

/2 R25 R26 R27 input shaft
(only available in Viton as I feel Nitrile is inappropriate in this application)

$18
Viton

/2 R26 R27 output shaft.

$4
Nitrile

$18
Viton

/2 /5 and R24 R25 R26 R27 double lip shift shaft.

$4
Nitrile

$14
Viton

/2 /5 and R24 R25 R26 R27 double lip kickstarter shaft.

$4
Nitrile

$17
Viton

R51/2 R51/3 R67 R68 kickstarter shaft.

$14
Viton

/5 input shaft
(only available in Viton as I feel Nitrile is inappropriate in this application).

$18
Viton

/5 output shaft.

$4
Nitrile

$18
Viton

4-speed rear cover gasket

$8
 (0.1 lb each)

5-speed rear cover gasket

$8
 (0.1 lb each)

TRANSMISSION BEARINGS
The /2 and /5 R26 R27 four speed trans have three shafts with a bearing at each end, the input, output and what is variously called the intermediary, counter or cluster shaft. If you open up the trans and find no accumulation of metal particles anywhere, and visual inspection of the balls and races of the bearings reveals no rust, pits or scars I see no particular reason to replace them.

Input shaft   /2 R26 R27:  

Front Bearing 6204

$9

Rear Bearing 6302

$6

Output shaft  /2 R26 R27

 Front Bearing 6303

$11

Rear Bearing 6204

$9

Counter shaft /2 R26 R27

 Front Bearing 3203 (aka 5203)

$23

Rear Bearing 6203

$8

Input shaft   /5

 Front Bearing 6304

$13

Rear Bearing 6304

$13

Output shaft  /5

 Front Bearing 6403

$29

Rear Bearing 6204

$9

Counter shaft /5

 Front Bearing 3203 (aka 5203)

$23

Rear Bearing 6203

$8

Input Shaft /6 and later airheads

 Front Bearing Unavailable  
Rear Bearing 6304

$13

Counter Shaft /6 and later airheads

 Front Bearing 6304

$13

Rear Bearing 6304 w/seal

$13

Output Shaft /6 and later airheads

 Front Bearing 6403

$29

Rear Bearing 6304

$13

TRANSMISSION SHIMS R26 R27 /2 and all AIRHEADS 1970-1995
These are used to adjust the end play of the input, output and counter shafts in the transmission to the specified 0 to 0.1mm (0 to .004inch). Available in 0.1, 0.2, 0.3 and 0.5mm thicknesses. Note that the stock R26 R27 and /2 input shim is cupped shaped between 0.4 and 1mm thick, and the input shims I am offering do not replace it, but are used in conjunction with the stock one.

Shim (Please specify input, output or counter shaft and thickness)

$2

/2 and R26 R27 shim kit.  Includes the following shim thicknesses/quantities for each shaft (a total of 24 shims):

    0.5mm - 1
    0.3mm - 2
    0.2mm - 2
    0.1mm - 3

  
$30

/5 shim kit.  Includes the following shim thicknesses/quantities for each shaft (a total of 24 shims):
    0.5mm - 1
    0.3mm - 2
    0.2mm - 2
    0.1mm - 3
  
$30

5-speed shim kit (for /6 and later).  Includes the following shim thicknesses/quantities:
    0.5mm - 2
    0.3mm - 3
    0.2mm - 5
    0.1mm - 5
  
$25

TRANSMISSION ADAPTER PLATE
If you have a need to install a post 1969 engine in a /2 this plate keeps the drive shaft splined-coupling fully engaged on the final drive splines, as well as adapting the slightly different hole pattern of the post 1969 transmission output flange to the /2 drive shaft. Be aware that this sort of conversion in today’s market severely lowers the value of the /2.

$82
(.5 lb.)