Quality gearbox rebuilds on unit twin models both the 4 speed and 5 speed types. The gearboxes are stripped and an estimate is produced for the work and parts required for the rebuild. All the individual costs are itemised. Worn gears are replaced along with the sleeve gear bushes and the kickstart ratchet gear bush on the mainshaft. The gearbox outer covers can be polished. New sprockets, tab washers and modern oil seals are used throughout the rebuild.
Clutch and beltdrive
We can supply quality parts to rebuild and renovate your clutch and primary chain. We would advise using modern friction material in the clutch plates and to fit the SRM clutch pressure plate conversion. This will improve the engagement and release of the clutch. The primary transmission on the Unit Triumph can be fitted with a complete modern style alloy clutch combined with a belt drive