cgallant wrote:is the bike in a stock state? Airbox, oil injector, carbs/jets, etc..?

Drilled out airbox. Expension chambers. Still injected. Not sure what was done to carbs when the bike was built out, but it ran fine for a while - - then devleoped this problem.

See it here:
http://www.youtube.com/watch?v=ozhtRS73MOw

Thanks
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1993 NSR250R SE MC21
2010 KTM 990 SMT
2004 KTM 300EXC
1996 Honda XR250