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blankslikesbikes

08 yzf450 no power high RPM

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I bought a used 08 yzf 450. it's hard to start, requires a little throttle with each kick. Seems to have good low end power, but as it revs up, it won't pull.

I installed an FMF header and muffler, and a boyesen quickshot 2.

I'm wondering if the problem could be jetting?

I think it may need rings and a new piston.

Any thoughts??

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New piston and rings in an '08? I doubt it. Check jetting and timing. Wouldn't be a bad idea to take the cam cover of and check cam timing too.

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