My TBX used to do something like that, but I wouldn't describe it as such a violent engagement. I think our clutch would be the same or similar since the engine & tranny in the TBX are Suzuki built.
The CVT that Suzuki uses is constantly engaged, there is no slip like in a Polaris, Kawasaki or Can-Am. Suzuki tranny's rely on a secondary clutch, internal and much like the automatic clutch used in the shift models. Yamaha transmissions are like this as well.
I figured that when my machine was hot, it was this secondary clutch sticking, most likely due to the expansion of something in that clutch causing it to stick just a bit.
I don't think this helps but I like to act like I know stuff.
