30 mm ( 1,0 liter more oil)
For R75, R75/6, R90/6, R90S models to 09/1975 with points ignition, Duplex timing chain (3/8X7/32) and smal oil seal front, only in conjunction with oil pump rotor inner with nut 3x5 to 09/1978 no. 114053.
1. oversize in 90,5 mm
You need 2 pc for one engine.
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