wicked vibration sound

[f.s.o.s]

i think the cam chain is rapping??/ it soulds fine at idle but when u rev it all you can hear i a rattleing sound. can you adjust the cam chain or is it self adjusting? please help...

Do you have skid plates that might be rattling?? Are you sure it's the motor??

[f.s.o.s]

already went through the small stuff just to make sure, it might be the valves but really not sure i'm going to try to adjust them..any help would be graet thanks

[Evan400ex]

Double check those skid plates. I had a rattle on my bike and I had no idea what it was. I thought it was the valves too but I was wrong. The rattle was coming from the right front corner of the skid plate. I had to hold in that exact spot to stop the rattle. I just overlooked it.

[Syrus]

Hahahaha, the whole time had my 250ex i had a wierd rattling noise, and now that i think about i bet it was the skidplates, i never could find where it was coming from :macho

[PHIL_B54]

check your heat sheild on your exhaust, i just adjusted my valves this weekend only to find it was my heat sheild. i thought i had something bad going on in my top end

[zephead400ex]

...damn the little things that are always overlooked:blah:

[Jingle #11]

same thing happend to me cept i thought my clutch was going out cuz it would only do it at a certain point. turns out hte upper right bolt broke. check ur plates to make sure.

[ZapsRacing]

Check all the little odds'n'ends and if it isnt that it could be the cam chain tensioner or the cam chain bein real sloppy. It kinda depends on what kinda rattle it is.

[hapychap]

Originally posted by PHIL_B54
check your heat sheild on your exhaust,

;) Can confirm this. 5 bikes in our little group out here in the very hot desert sands of Arabia have the same problem all attributed to the heat Deflector shield on the Exhaust. However 2 bikes also had a rattle which could trace to the skid plates. :eek2:

[f.s.o.s]

it has no heat shield it has a curtis sparks race pipe. i think we cure the problem with adjusting the valves and doing an oil change.. thanks for everybodys help

[Quad Dude]

ur cam chain tesioner is on the back side of ur cylinder head and ive had one go bad on my 400 but i might just be loose just take it of and its pretty simple to figure out how it works and then just tighten it.

hope that helps