09 CRF450R dies in 2nd gear

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8/1/2017 8:13 PM

I can't seem to find an answer to this issue and figured this would be a great place to ask, loooooooong time lurker.

So the issue started a few weeks ago, 1st and 3rd-5th work great, 2nd is fine until about 1/4 throttle then in just dies, almost like you're pushing the kill switch down. Since the issue started I have installed new clutch plates, had an extra gear position sensor laying around (idea what it's actually called, here is the part number 35759-MEN-A31) tried it, no luck. Also tried disconnecting the kill switch, no luck.

Any input would be greatly appreciated.


8/1/2017 8:31 PM

Clogged fuel filter in the tank is most likely culprit. The 2009 was notorious for this. Especially if it still has the original undersized filter and not the later, bigger one.


Powerband in every gear !

8/2/2017 7:53 AM

Thanks, I replaced it a couple years ago and installed a twin air fuel sock but I pulled it out last night and it was pretty black. I will order one up