Im looking for the same. As for myself Ive installed Flat Slide Carburators, 38mm, they seem to work okay, but have a major hesitation between 4500-5500 after I punch it it clears up a little bit. Burns cinnamon at full throttle but idling is horrible up to 2/3 of a throttle. My old 38's (round slide) ran awesome. I havent figured it out yet.
A forum community dedicated to snowmobile owners and enthusiasts. Come join the discussion about performance, racing, troubleshooting, trails, maintenance, riding tips, modifications, classifieds, gear, and more!