my buddy has a 05 ski doo 1000, crankshop twins, boondocker box, filter pods, this thing is a turd! right as you need the sled the most if feels like it just bogs out til it almost dies.. its left him in some really bad situations.. the rav valves have been adjusted, ski doo dealer said they didnt know what was wrong, it recently had a full rebuild. any help would be great! thanks