Yz250 2008 jumps into gear from neutral

[Tunster]

As title says my newly aquired yz jumps into gear from neatral. What will be worn? Selecter forks or spring on drum?? Any ideas or advise please. Im told the bike has a full wr gearbox fitted as it was used for enduros.also the motor seems very flat off the bottom unless i abuse the clutch,could this be due to the flywheel weight? Should i remove it and if so will it give it more grunt off the bottom? Thanks.

[_X_]

if you want snap, remove the fly wheel weight.

[SachsGS]

Usually when a bike jumps into gear it is because the back of the clutch basket is rubbing on the gear selector mechanism and causing it to rotate into gear. Check for wear and incorrect shim/thrust washer placement.

[Tunster]

Thanks guys i have yet to investigate but the previous owner said he had just fitted a new barnet clutch to the bike, im now wondering if this is the problem? Has anyone else fitted one of these? Were there any issues with fitting?

[TMKIWI]

I would check the clutch measurements.
A mate just put a barnet on his 450 and couldn't get the adjustment right.
Pulled it apart and measured it up ( he is a machinest ) and found the pressure plate was machined 3mm wrong between the clutch face and the thrust bearing surface and was not allowing the plates to come free.
He had to put his stock back in.

[Tunster]

Ok thanks will do,although the clutch works perfectly well,and as i have just bought the bike i dont have the original basket but i do know a great machine shop if i need it modifying if thats possible?

[TMKIWI]

His was not machineable as the pressure plate has a thin stainless? ring for the plates but they did not allow for the plate thickness when machining the thrust surface. " title="Angry" class="smiley"> fubar
Throwaway.

[Tunster]

Ive email barnett to see what they,im not sure if there is a distributor here in the uk.