I had an 04 rx1, sway bars, skis shocks rebilt+revaled, just could not get it to handle, to heavy. I got rid of that and got 06rtx, did all the stuff to that too, to heavy. I went back to 2 stroke, did not want to but wanted to give the xp a try? Sorry guys, they don't last as long but they are alot more fun to ride. The yamaha is just to heavy for me, it all depends on how you ride it I guess? The 4 s motor is so nice, just to heavy. The 2 s motor won't last as long but is so light and pepy, to me = more fun !!