RMZ 250 popping
 

Guy.s need a little help.
2011 RMZ250, bike ran fine the week before the next week make too laps on the track then the tone of the engine changed. Bike starts fine, if short shift runs good but if try to push the engine to a higher rev the engine pops. Soungs like fuel or electrical (don't know). Its hard to work on these bikes now that they fuel injected and the elect. stuff. Plese any suggestion.:confused:

Dirt bike pilot jetting. PLEASE HELP?
I have a 2005 rmz 250 with a pro circut T-4 exhaust on it. At low rmp it kinda pop/cracks noise and is a little "bogish" but when mid trottle and higher rmp the thing rips and runs mint. my friend says that it should be more responsive off the line like it is in higher rmp. so he suggested changing the slow jet. The stock is #40 and i bought a #42. will this fix my problem or make it worse?

I'm having the same thing with mine, and if I give it a shot of full throttle from idle it bogs and then kits. Any one know what the problem would be exactly?