my 2013 rzr XP900 now has 2200miles /220 hrs on motor. I was just wondering how inportent is it that i need to have valve clearance checked? the owners manual says 2000miles/200hrs….my rzr starts easy cold or hot and runs great. The one that is getting more noticeable is my hydraulic chain tensioner rattles more now at start up . i just change my oil with polaris 10w50 for summer time riding see if that help with start up rattle .