2010 YZ450F

I just Bought a 2010 YZ450F and after 3 rides it's back firing and has no power, Idles fine.  

Check your cam timing. It is possible your cam chain jumped a tooth on the timing.

sounds like a leak in the exhaust system or a worn out silencer. Something along the lines of repacking and a new cylinder to exhaust gasket should fix it...

If it starts and idles OK, but won't go beyond that without falling apart, then it sounds like a plugged injector, clogged fuel filter, or a failing fuel pump.

Try running some injector cleaner through it, it may clean it up.

I think your right about a fuel problem. I don't see where a filter might be.

Try running some injector cleaner through it, it may clean it up.

I put some in but hasn't made any changes so far.

I believe that you may have to disassemble the fuel pump to check/replace the filter.

If it starts and idles OK, but won't go beyond that without falling apart, then it sounds like a plugged injector, clogged fuel filter, or a failing fuel pump.

The dealer said the same thing. We might the filter be on this beast.

I believe that you may have to disassemble the fuel pump to check/replace the filter.

Sounds like I'm pulling the pump tomorrow.

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