This isnt relevant to an Xp, but One day RKT and I ran a 166 Doo belt, 288 race belt, and a gates extreme on my 05' and an 07 he had.
the 166 held rpms and pulled hard up the superbowl or whatever the hill is called. the 288 and the gates held great, almost identical to the 166 till about somewhere between 30% and 40% up mountain. then went blaaaawww and lost 300-500 rpms. Both did that almost at the same spot.
Same heavy wet slushy snow, Only change was the belts. Went back to the 166 belt and all was well again.
The 288 is a very durable belt.
Again, not an xp, but i found the results interesting.
377 and 288 belts take less pin weight than a 166 or 283(?). Must be more grip or something.
