The sled did'nt have spark so I brought it to the dealer. When I got it back it idled fine but than when you give it gas it sounds like a yamaha rx1!!! The sled is a wannabe 4 stroke! what could the problem be...its a 2000 xc 600 sp with the powervalves for people who dont know. It almost seems like its getting to much fuel but there is no bog.