yea, i agree, the indy 500 prolly has about 80 hp. but i would go with the ss 550, those are great trail sleds. i'm pretty sure that 550 is the same motor thats in the new pro-x 550, not possitive tho. the 500 and 550 are the better sleds, the 340 just isnt enough, it really depends if u want the fan or liquid. they're all great sleds........THEY'RE POLARIS!!!!!!!