Norton Commando 850 Mk3 Gearbox Rebuild Kit – AMC Transmission – 067280

Norton Comma 850 Mk3 gearbox rebuild kit AMC transmission (part number 067280) — a comprehensive rebuild kit for the left-hand-shift AMC gearbox fitted to 1975–1977 Norton Commando 850 MK3 models. Covers all the key bearings, seals, gaskets, and O-rings needed to fully strip, inspect, and rebuild a tired MK3 gearbox in one go.

The AMC gearbox used on the Commando MK3 is a proven unit, but after 50 years it benefits from a full internal refresh. This Norton Commando 850 Mk3 gearbox rebuild kit AMC includes quality UK-made components to Norton specification, making it ideal for curing oil leaks, noisy running, and worn-out transmission parts during a restoration or engine pull-down.

Includes:

• Main shaft, layshaft, and kickstart bearings
• Oil seals and O-rings for all external locations
• Gearbox gasket set
• Small service items

Fitment: Norton Commando 850 MK3 (1975–1977) with left-hand shift AMC transmission. Part numbers: 067280 / 06-7280.

This kit is a complete gearbox overhaul set for the 1975‑on Norton Commando 850 Mk3 with the left‑hand shift AMC transmission, supplied under Norton part numbers 067280 and 06‑7280. It brings together the key bearings, seals, gaskets, O‑rings and small service items you need to strip, inspect and rebuild a tired Mk3 Commando gearbox in one go. Using quality UK‑made components built to Norton specification, it is ideal for curing oil leaks, noisy running and worn‑out transmission parts during a restoration or engine pull‑down