GPX 250 hits 10000 revs then misfires back to 7000

[Grant]

hi guys n gals, i just bought a GPX 250 and when it gets to 10000 revs it misfires back to 7000 can anyone tell me why, thanks

[Gosling1]

no.

Because trying to diagnose motor problems over the internet is just a guessing game for most people. Take the bike into a mechanic and have them tune it up. During this process - they should find out the problem 9 times out of 10.