ghawkman
12-24-2002, 10:05 AM
My 2001 400EX just started vibrating very badly and getting much hotter than normal. One shop said without tear down, I need a new top end. I didn't belive them so I tore the top end apart and looked at the cam, valves, piston, rings, etc... I see no damage from sand at all. The connecting rod to the piston is not loose. I do have oil on the side of the motor where the flywheel is. I don't think that is normal is it? If not, then possibly that crank bearing and seal on that side are bad allowing oil into that side of the motor, which would explain the vibration. I want to get all your ideas to look at before I get myself into trouble tearing apart the whole bottom end.
ANy ideas what could cause a very bad vibration at idle and gets worse at high revs? Is there anything in the top end that could cause a motor to vibrate that bad? There was some noise in the very top end that sounded like there was no oil in it. But the oil was full..
Please help!!!!! PLEASE... I am so lost with out my bike. It is near new. Only ridden about 8 times only in the sand!!
ANy ideas what could cause a very bad vibration at idle and gets worse at high revs? Is there anything in the top end that could cause a motor to vibrate that bad? There was some noise in the very top end that sounded like there was no oil in it. But the oil was full..
Please help!!!!! PLEASE... I am so lost with out my bike. It is near new. Only ridden about 8 times only in the sand!!