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05 Rm250 rattle/vibration

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Im getting ready to work on my nephew's bike just wanted to get some ideals first. 

It has a rattle in the clutch side somewhere and a bad vibration! Any ideals before I open it up appreciated

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RM's are notorious for soft clutch baskets. It's probably notched to heck and back.

Big vibrations could be anything from loose motor mounts to bad main/ crank/ clutch bearings.

When was the last time all the motor bearings we're replaced? If it's been more than a couple years or you don't know the answer, then it's probably time.

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Ok , so I've got into it. Basket was wore but not terrible and I've filed grooves flat, changed bearing even thou it didn't seem bad! Rode it Abit and no noise! Changed oil n rode again (20 min) and still nothing and I hammered it! Compared to my 01 yz 250 it does vibrate like crazy but no noise! Any ideals?

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I've seen the rubber cushions get wore out on clutch hub and rattle viberate.  Also even kick starter idler gear get wore and rattle.  Could be few different things.  

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