nick5oh
Member
ive heard this helix is an oem and is a 51/43 but shifts closer to a 48/42. I need to know the complete correct part number or what sled it comes on. I searched on partzilla "8bv" and came up with 10 different results off of various sleds. thanks guys
8fa-17604-00
http://www.totallyamaha.com/snowmobiles/aaTECH/drivespecs/camangles.htm
In the tech section under clutching and jetting then select cam angles.
In the tech section under clutching and jetting then select cam angles.
A couple of bucks
VIP Member
RX1s & Apex.
Yamaha list it as a 51/43 but it will pull the same rpm and same mph on testing as a 48/42 with no other clutch changes, back to back testing,so that's really what the ramp angles will work out to be. I have not measured one on a cmm but the day I tested it was accurate as I checked many helix, they all will change rpm and mph with as little as 2 degree change. The manufacture of helix also makes a difference as the ramp radius is different from helix brand to helix brand. some are more aggressive then others even with the same angles (example 50/40 bender to a 50/40 Dalton).
Stick with same brand when fine tuning to your like............
nick5oh
Member
Mr viper you recommended me a 48/42 so I figure I'll pick up one of these to try out. Thanks everyone !