My friends Express 300 has an excessive vibration in the engine. It's so bad, that it is starting to wear a hole in the bottom of the carburautor. He just had a top end replaced, but the vibration did not go away. Any ideas? It starts fine and idles good.

Thanks,

 

Hey there my friend am i just took the back clutch wheel off his 400 quad, He had alot of Vib. also. + his quad seemed not to be grabing the belt to hit higher speeds. Just some info, Might wanna take the clutch cover off and look around. Seemed like the bearing were goin out of the back clutch wheel. doesn't take to long to zip the cover off and take a look! just some info

Beep Beep

Brad