sweet ride, had one myself, actually it was my 1st new sled... must have started out a few thousand sledders of the world with that model, i know Yamaha sold tons of em!
keep the shinny side, up. a little clutching and a pipe will give ya 70 hp!! if you need more... still reliable 24-7 or 31 like they kids say ..
We were having a race home on the lake (lake is 35 kms long) and the little crap box beat me home! I was on my 500 summit! But it was running really bad then! now he wouldn't have a hope in hell! LOL i guess a cant say that till we try it next winter! I do know that it doesn't skip water very good! (the phazer)
I dont think it has 90hp! My 500 has 90hp and you know how that thing runs!It just cat walks every were!
I would guess with that custom bend pipe you made for it after you hit the tree you should have about :d70HP!!