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Clutch help

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09 250f clutch completely disengaged while riding.  Thought the cable broke, as the lever flopped around but it's the actuator arm, it has zero resistance.  What would physically break while riding to cause this?  

 

 

 

 

 

 

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Thanks for the responses guys, appreciate it.

Going to pull it apart tonight and inspect.  I've owned a lot Yamaha's and never had this happen, really surprised.

So looks like I will need a new push rod 2 or the actuator arm.

Will report back what I find.

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Well all the clutch boss teeth ripped off.  Push rod is fine.  I see yamaha has a superseded part number for the boss, this must be why.  New one on the way.  Was pretty dangerous when it happened, so I'd replace yours sooner than later.

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The interior aluminum teeth of the clutch boss that ride on the steel "main axle" I guess it's called (right behind the main nut and lock washer), sheared off.

Once I removed the pressure plate I saw the clutch boss nut was already spun off the axle, yet the lock washer was still firmly in place.

 

Riding motocross going through a 3rd gear turn about to hit the face of a jump and thought I hit a false neutral.

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