I saw this schematic , i guess you need to line up the valve plates so the shut and open when actuated. :?:
http://www.totallyamaha.com/snowmobiles/aa...H/YPVS/YPVS.htm
Hi, i got this a couple of months ago, it is well cool. 8) .Can anyone help me make it go faster ! I can only get 65 out of it, and so I have stopped eating .