smoking belts?

I’m new to canam and I have a 13 Rene 1k xxc a few weeks ago I took it out in some mud for the first time. I ended up smoking the belt which then blew about 20 mins later. This machine had 3k miles on it so I just assumed it was original belt and blamed that on it blowing, well I put a new belt on and broke it in before I started playing hard again. This weekend I was back playing in the mud again and I smoked the belt again, it didn’t blow this time, yet, but it has me concerned. The Rene is stock performance wise with a snorkel kit and 26" maxis bighorns. There is also no evidence of a leaky snorkel pipe "no dirt, mud, water in clutch housing". I would really like to put some bigger mud tires on this but what’s the point if I would just be eating belts up