My son's Raptor can get it up, but can't keep it up. It runs great, but when it is in the nose up, wheelie position, it stutters and craps out, bringing the nose back down. Any suggestions?

 

fourlix, I would think it would have to be fuel related. either float or crud floating around somewhere clogging up when inverted. Looks like you would see it climbing hills.

 

Yes, I definitely suggest checking the float levels in the carbs. I have just recently had this problem, after a rebuild and more jetting, mine were off!

It is easy to bump them while the carbs are apart too. I remember lying my carbs down on the bike while doing something away from the bike, I'm assuming now that I had them lying on the right carb's float tab while the bowl was off! DUH!! Because when I went back in there to check them, the right carb's float was off quite a bit! I set both of mine 1 mm below the spec of 13mm, they are now set at 12mm.

This is where I would start looking for a cure! Good luck.

"TOID"