We went for a good ride this weekend, even though it was 15 Degrees at night. My XTZ did pretty well. Went everywhere highly modded RZR went. Problem, It started bumping on rev limiter in all gears. Even high range, worse the rpm's where it was bumping got lower all day. Has anyone heard of this crap. I think at the end of the day it was bumping about 4800 rpm's. Any suggestions?