there is no disadvantage all advantage, extravert drivers lets you loosin the track considerably which reduces friction therefore you go that much qiucker.remember,friction comes in many forms and it is up too you too reduce what you can. on my 05 800 ho, i can push pull that sled with the belt on with no prob.when the sled is at idle and on a stand, the track just moves slightly.
edit: best to get the dealer to install them, bin sleddin since 79 and you need to press them off and press them on with detail. but your chioce.
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!