Gearwheel for input shaft

Gearwheel input shaft 17,5° 30mm
This gear is where the power is transferred in all gears. Originally, this part had a 15° gear cut. This was changed in 4/1982 to 17,5°.
Price per piece.

If your bike was manufactured after 4/1982, but before 3/1985 then this part is a direct replacement.

If your bike was manufactured before 4/1982 and never upgraded to the newer design, then you will also need to purchase a new 5th gear wheels that are also cut at 17,5°

You will also need:
Art.no. 2321997 Intermediate Shaft Gear (not available from BMW)
Output Shaft 5th Gear Wheel.
With this gear you have some choices:
Art.no. 2322993 Standard Milled gear with 5% taller gearing
Art.no. 2322992 Polished gear with 5% taller gearing for reduced friction
This is a high quality reproduction transmission gear that is better than original. Top quality precision manufacturing in Germany. This part features an undersized ID of 2/100 mm and it will have a perfect fit on used shafts.

Made in Germany. Top Siebenrock quality.

Spare part for the classic BMW 2v Boxer models
R 80/7, R 80RT, R 100/7, R 100RS, R 100RT, R 100CS, R45, R 65, R 65LS, R 65GS, R 80G/S, R 80ST
Paralever models R 80GS, R 100GS, R 100GS PD, R 80GS Basic, R 80R R 100R, R 100R Mystic
Monolever models R 65, R 65RT, R 80, R 80RT, R 100RS, R 100RT.

Compare: 23221242991/ 23-22-1-242-991