Master Cylinder Rebuild Kit - 17mm piston / Dual Disc / Airheads '76-'80

Top quality aftermarket 17mm Master Cylinder Rebuild Kit for Airheads 76-80 with Dual Disc

Replaces BMW OEM part# 34311234927 which is no longer available from BMW

Machined and hard anodized aluminum piston

Complete with all parts needed to perform a quality rebuild of the under-tank 17mm master cylinder

New main cup seals already installed on piston providing an easier assembly

Fits all models from 1976-1980 except R65.

Note: if your master cylinder bore is pitted, we recommend Apple Hydraulics in NY for sleeving services.