If its like my f7 no reverse, on the front of the chain case, towards the front of the sled. In the middle there will be a bolt and jam nut in the middle. Loosen the jam nut, tighten the bolt or loosen whichever then with your wrench hold the bolt in place and tighten the jam nut to the chain case to hold it. What I was told is to tighten the bolt hand tighten then back it off a little bit quarter turn maybe? I can't remember off hand I have it written down somewhere. Also have an owners manual that I should actually check lol
