I just got an '88 Formula MX. It seems to have a Polaris primary clutch on it. I want to settle it down so it is very mild for kids, what was the standard engagement RPM for this sled? I am thinking it was probably ~3k, this polaris clutch is grabbing at 5k and I want to start at a lower RPM. Was this polaris clutch some kind of popular mod for the Formula's?

Thanks
Scott