Hi, first of all im from colombia, south america (sorry for my english), i own an 07 raptor 350, the thing is that when im in neutral and i push the throttle the revvs are fine and the atv sounds quite well.. the problems begins when im in any gear, the bike starts to sound like bogging down and it starts to lose power, but when i reach a considerable speed, the revvs start to sound normal and the bike gets its normal power again, please help me with this, THANKS

 

You can try to adjust the small fuel screw inward,plus drop the jet needle and see if it helps,but sounds like it's bogging from too much fuel on take off.Also float level may be off,allowing too much fuel until engine rpms can accept the fuel, or a worn float needle allowing too much fuel into the carb bowl can do the same thing. If you narrow it down to a problem in the carb,I'd install a rebuild kit rather than just trying to clean a carb or adjust it.http://www.ebay.com/itm/Yamaha-YFM-350RSE-Raptor-Special-Edition-CARBURETOR-CARB-REPAIR-KIT-2005-2007-/321102831238?hash=item4ac3385e86&vxp=mtr

 

i tried everything bro, i think i'll go for the repair kit, thanks a lot