High rpm misfire...

[mick chiz]

check your exup valves working,(take cover off and move it with your hand)also a dry air filter can cause all sorts of problems if you have an aftermarket one,k+n or pippercross,make sure that they are oiled correctly.another thing it could be is the fuel filter,very easy and cheap to replace.ive learnt over the years to start replacing the servicing parts on a bike before going full technical if any running problems arrise