When it happens
You’ll hear a bang or a clatter, and lose drive. If the rear wheel locks, pull the clutch in and keep the bike straight. Coast to a safe stop, away from traffic.
Check before you touch it
- Engine casing around the front sprocket: a whipping chain can crack it. If there’s oil leaking, don’t start the engine.
- Rear wheel: does it turn freely? The chain may be jammed between sprocket and swingarm.
- Chain and sprockets: worn, hooked sprocket teeth or a stretched chain are the usual cause.
Can you refit it?
If the chain has only jumped off and isn’t damaged, and the adjusters have just slipped, you may be able to refit it and adjust it. But a chain that jumped off once will do it again if it’s worn. A snapped chain needs a new link at the very least, and usually a new chain and sprocket kit.
If in doubt, don’t ride. Call us for a breakdown recovery to a garage or home.
FAQ
Rider questions
Can you move a bike with a locked rear wheel?
Yes. We can free the chain if it’s jammed, or use a skate under the rear wheel to load it.