Overheating in Suzuki Burgman 250 Year 1998

Good afternoon, I have had a Suzuki Burgman 250 year 1998, stop three years for a small accident. When starting it, it started perfectly, keeps the perfect slowdown and works well in general, but I notice that the exhaust pipe, the rear wheel and the rear axle group are heated in my excess. He even smells overheated.
The temperature indicator is normal. What checks can I do to try to see where can the problem come from?