Just bring ing this back up due to an issue I saw today running my savage. I was experiencing the same thing as Tam13, engine revving and movement was minimal. I thought the engine was going to blow from revving so fast! I started poking around and I checked the clutch, wheel hexes, 2 speed, EVERYTHING. I took my savage apart 3 times to finally notice that my damn sliupper nut had backed outquite a bit. I tightened her back in and applied loctite blue and then backed it out a little. My savage pulled wheelies right off the bat. scared the crap out of me as it was facing me when I checked it out. THIS IS A SAVAGE NOT A BUGGY. LOL That directed to those who know of that story. Anyways, just a tip check your slipper nut that it hasn't backed out any.