i changed my idler gear just before my 6 months warranty expired. i would rather spend the $90 on tires and gas, but i would rather not spend 100's on a grenaded engine, so i bit the bullet. i was quite surprised with how much better the stroker gear fit on the shaft, so i'm glad i did it now. as far as i'm concerned, that gear is the only really lame thing about the klx300. the other stuff that people spaz out about (cv carb, restrictive headpipe and airbox, etc...) are either easy to fix yourself, or don't really affect me for trailriding and beginning enduros until i get some more riding skills.
mw