Polaris Clutches installed just in time for just one test ride. The conditions weren’t ideal but good enough to put a smile on my face
. It performs MUCH better than any combination of Kawasaki clutching that I tried. Engagement was around 6000, and it held steady at 8800-8900 until I ran out of runway.
It was relatively easy to install the Polaris secondary: Shorten the jack shaft by 1/2”(cut the clutch side), then cut a 1/4” keyway 4.25” from the cut end and you’re ready to install. Source some various thickness 1” shims to install between the bearing and the secondary on the jack shaft. Use these shims to determine the correct offset. The stock Kawasaki secondary bolt is too long, so I used and extra gear bolt and washer from the other end of the jack shaft. Use the stock aluminum secondary shims under the bolt to shim the secondary. It needs to “float” by .040”. No welding was required.
For next season I will be installing ported 4/6 cylinders and custom shaped high compression heads (Thanks Interceptor398 for the awesome work on the heads!). I have already pulled the trail ported Invader cylinders (they will be going on my trail rider 81 Invader along with the twin Kit pipes), the porting proved to be less than optimal for the high rpm tune of the new pipes.