I have a 08 nytro mtx with the MPI 280hp kit supercharger and it's been boosted for 3 years now and I hate it most days. I have a lot of money in my nytro the ezryde 174 skid withe a 2.5 extremely track, cromoly front end a-arms, fox float 2, red line tunnel ext, mesh hood without the light. And every time I ride it, it dies all the time I let off the throttle and the pulleys keep falling off. So now it's my back up sled and I went and bought a m1000 turbo and no problems. I asked mpi about why it die after I let off the throttle and they told me it's a common gems setting or some crap like that. If I could do it over I wouldn't bought a mpi charger. The bad part is I was a big big YAMAHA fan (rode them since I was 3 years old) but they won't change anything to be competitive anymore, so I went green. If they change I might go back to blue, but never ever go with MPI again!