2014 polaris sportsman 800 fan issues

I’m trying to rule out replacing fan motor sometimes it works fine an other times fan surges fast then slow is there a fan circuit breaker on these like some of the older ones had. Also noticed my y pipe coming of the head for exhaust is orange at night only exhaust work was the stock conversion muffler as shown on u tube I use a lot fuel.

2014 polaris sportsman 800 fan issues

I’m trying to rule out replacing fan motor sometimes it works fine an other times fan surges fast then slow is there a fan circuit breaker on these like some of the older ones had. Also noticed my y pipe coming of the head for exhaust is orange at night only exhaust work was the stock conversion muffler as shown on u tube I use a lot fuel.