here is the story I have a 1972 bombardier valmont alpine witch I have a 900cc 3 cyl kubota diesel in that I will be machining a adapter for to mount a p85 polaris clutch on becasue they are easy to work on and I have a relatively new one on hand, the chain case is a modified yamaha vk 540 chain case so I have high, low and reverse and I am using a yamaha enticer 2 secondary clutch and jackshaft because its what I had on hand and the enticer 2 jack shaft had the same spline and the vk chain case.
so now that you all know I'm crazy and what I have built I need help with the clutching, for the diesel I need the clutch to engage at ~1000RPM and I would like for it to hold ~3000rpm while driving. max RPM on this engine is 3600. so if anyone can point me towards what weight spring to use and what weights to start off with as a baseline that would be great becasue I am lost in the dark on this one.
here are some pics. dont mind the mess.
still need to shorten the jack shaft.
so now that you all know I'm crazy and what I have built I need help with the clutching, for the diesel I need the clutch to engage at ~1000RPM and I would like for it to hold ~3000rpm while driving. max RPM on this engine is 3600. so if anyone can point me towards what weight spring to use and what weights to start off with as a baseline that would be great becasue I am lost in the dark on this one.
here are some pics. dont mind the mess.




still need to shorten the jack shaft.
