Zr800 that is about 200 hp on motor that I run a 50hp shot of nos that I trail ride and a thundercat 1000 that is my lakeracer, that is a dynoed 276 motor that I also run a 50 shot in. I added the nos after I had it dynoed so unsure of actual #'s on nos. and these are not really competive around here any more. I can hold my own on the trail, but on the lake the new turbo'd 4strokes rule the roost. I know of a few here that are 400+hp to the ground, with traction and launch controll...