the best solution is to buy a new muffler. slow riding creates lots of carbon in the silencer so ive read and heard.
I always ride fast but my bike behave abnormal after getting heat up it losses the cranking sound and become very soft
guy I want to change the tube of exhaust as many ppl bore bigger inner tube in 70 exhaust is it possible in 125
Get it properly tuned. If it has done 11000 then there shudnt b any trouble after a good tuning.