ModMMax
New member
I need to learn something about helix angles for a roller rooster driven clutrch. Engine is a MM 700, ported, piped, ATACC, V-force, 19cc domes PP head, nitrous. Using a roller rooster with a 47-43 helix with 90 degrees of pre load. I also have a 45-39 helix that I have never used. What effect will it have on performance? Riding from 7500 - 10000 ft. Primary clutch using stock flyweights with one aluminum rivet in the inner hole. RPM at WOT is 8900, 9300 on the button. Everything works very well. Just wondered what the other helix would do for me. Thanks in advance.
The other helix will lower rpm,s. I think at that altitude it will work better but your gonna have to add more weight to the primary weights to get rpm,s down. That 1st helix won,t work well in the mountains; it is too steep. Use the shallower angle helix at higher altitude.
ModMMax
New member
Thanks Turk