need advice on a big engagement spring. what can i use

[sxrsist]

races this weekend and i need to find a primary spring with big engagement. i have the daltons on order but wont make it in time. any suggestions? what would heel clicker whit do ? the 45 on a yamaha spring is not enough yet.any other possibiltys? running 8ay weights need about 6500 engagement to get out of bog on a old kawasaki invader 4/6. motor is a bit tired but has to run for this weekend. out of bog seems to be ripping. had comet on before at 6500 and came out good. i have a epi red and im only getting 5500. need more, thanks guys

 

[sxrsist]

how does heelclicker rate there weights , the white is 170-300. how does that compare to the 45 start on yamaha

 

[Hammer Down]

Shims

 

[Throttle Junkie35]

Your going to have to notch the weights to get that kind of engagement and maintain the correct peak rpm. You wont be able to put enough spring or shim in a Yami clutch to get that engagement and actually have the sled shift.