vakev, Check the seal on the engine/ primary clutch output shaft.. The fix..............you have to split the case...... to properly replace.. I am sorry for that kind of news..So I recently replaced the belt and the old one had some oil on it. The new one has started to slip again and this time there is a ton of oil in there. Has anyone had this issue? And can point me towards a fix! Its a 2011 800xp. Thanks for the help!