2016 XP 1000 with about 100 miles on it completely stock. Under wot hitting rev limiter at 8400rpm (I think) 30-50 mph. I read this somewhere else and spent the last 2 days trying to find it again and the solution to it. Any help is appreciated. I have not gone much faster than 50/60 mph but if I let off it will keep accelerating.

Also has the front diff marble sound just like my 2014 but I know the cause of that.

I guess it needs slightly heavier weights or a reflash with slightly higher rpm max.