I'm getting mixed answers on this question, everything from 90 mph to 105 mph. I just got the sled, and if will only go 90 mph, I'm gonig to sell it, and go buy another 570 Exciter. I could get 90 mph out of that sled all day. Damn my 1990 Mach 1 will do almost a 100 mph.
If I could get 100 mph out of the sled I would be happy, does anybody know what a stock 700 vmax will do, surely someone has done a radar run with one of these sleds. Changing the gearing will be my option, if I can't get at least 100 mph.
I've changed the sprockets on motorcycle's, and trikes, but have never done a snowmobile. You said change the top sprocket by +1, would you change the bottom sprocket, and if you do , I would imagine a new chain is also needed.
Yes, you would likely have to change the chain unless it has enough slack in it.
Usually there might be enough if you are only changing the top one as the difference it diameter of the sprockets is quite small.