I WAS RIDING A 04 GRANDTOURING WITH 800SDI AND AFTER 15 RUNS I WAS BEAT BY 1 TO 3 SLED LENGTHS EVERY TIME MY POINT ON THIS IS WHEN YOU ORDER THE REV WITH THE 800SDI OR 1000SDI FOR THE 05 MODEL YEAR YOU SHOULD BE QUITE HAPPY. ALSO OVER THE WEEKEND MESSING AROUND WITH THE REV I PUT THE FAT SIDE DOWN ON THE COUPLERS AND WENT 1 CLICK STIFFER ON THE REAR SPRING AND FLIPPED THE RUBBER STOPPER UP ON THE REAR AND AFTER 80 MILES OF TRAIL RIDING MY ARMS HURT FROM HANGING ON THE SLED.. ITS GOT ALOT MORE BITE