A forum for owners of Yamaha TTR250 trail and enduro bikes!

It depends on how bad it is as to what you need to replace. If it is banging you should replace it ASAP or it can cause expensive damage to the starter gear,pinion gears or even the casing. I would suggest to replace or remove it until you can fix it.

If you want to remove it completly just remove the sprag clutch & all other starting components & use a 30mm freeze/welch plug for the hole where the starter motor sits.

To replace the sprag clutch all that should be needed is the sprag clutch, depending on how long it has been banging/clunking for. Worst case scenario is that you need to replace the pinion gears & starter motor.

These are the parts needed below.

You may need to replace the little pinion gear also but that would be up to you to decide.

Worst case scenario is that you need the large pinion gear & starter motor

Don't let that deter you from replacing it as it is most likely just the starter/sprag clutch that needs replacing.

Here is another vid of a sprag that sounds worst than it is....