not difficult to change at all. the first way are to get a long m6 bolt to screw apart the secundary (se how they do it on can am) and then remove the belt. The second way is to take the primary off.
On my machine i had a ultimax belt that did blow upp after about 10000 km it was abit jerky at the begining because it wantet to grip the primary even at idle. got better after about 20-40 km
recetly i put on a moose belt. it wasen't jerky and wanted to grip the primary at idle. It feels easier to crawl at low speed s with this belt but not sure.
the difernce is that cf moto has m6 bolt and can am has m8 bolt.