Vibration problem at a certain RPM?

[mjc85]

When riding there is a small part in the rev range where the bike vibrates pretty badly. It's only in the middle of the rev range so i'd say at like 4000rpm and only last a few millseconds but it does it when you go back through those revs when you back off the gas. If you accelerate in neutral you can get it to sit at the RPM where it vibrates and the the whole bike vibrates.

I had the valves adjusted the other day, could it be something to do with that ?

 

[Dirt Bikez & Pocket B]

i know wat it is, ive had this problem, it was the engine, it was loose from the frame, tighten the bolts really tightly then ride no hard feelings from b4
hope it helps

 

[mjc85]

Cool, i shall do that, thanks yeh none here either.

Mitch

 

[Dirt Bikez & Pocket B]

did it work? :roll:

 

[mjc85]

Havn't started the bike yet, it was to late. Will test this afternoon They weren't to loose, but i hope it works.

 

[mjc85]

Ok well i figured out one of the allen key bolts right on the bottom engine mount fell out and the other one was loose, i bought a new one and did them both up tight and the bike still vibrates. Do you think the valves need adjusting again ?

 

[Dilox-125cc]

Yeah i thought that it was a loose bolt to.... had the same problem i feel for u bro :lol: :wink: