What is a Shaft Final Drive?
A drive shaft and bevel gears that carry power to the rear wheel — no chain or belt at all.
Simplified animation — not to scale.
In plain English
Instead of a chain or belt, some bikes route power through a drive shaft running inside the swingarm to a bevel gear at the rear wheel — near-zero maintenance, at the cost of some extra weight and complexity.
“The same basic idea as a car's rear-wheel-drive shaft, just scaled down and tucked inside the swingarm.”
How it works
The gearbox output spins a shaft enclosed within the swingarm, which turns a set of bevel gears at the rear axle to redirect that drive 90 degrees into the rear wheel. It's sealed and oil-lubricated, so it needs virtually no day-to-day attention beyond periodic oil changes.
Signs of trouble
- ⚠Clunking noise on take-up of drive
- ⚠Oil leaking from the final drive housing seals
- ⚠Vibration through the rear of the bike
- ⚠Whining noise that changes with road speed
£200–£900
Always get a written quote. Prices vary by bike, region, and parts brand.