I have a 200cc motorcycle which i use for daily ride to my work for just around 20 minutes only. I always had this problem of having low power after I decelerate using engine brake. Here is the scenario.
When I decelerate using engine break especially in downhill terrain and rev the throttle, there is a change in the acceleration power and the sound of the exhaust. For example, i use only 1/8 of the throttle power usually to attain 60kph. But after the problem, it takes 2/4 to 3/4 of the throttle to attain 60kph on the same gear. Another thing is the exhaust sounds not the usual like it has a lot of air and there are popping sound everytime i use engine brake when it has low power and the normal will come back after some minutes. I dont know whats happening and i already took my bike to the mechanic and explained what happened but he also cant diagnose the problem since everytime i took the bike to the mech, the problem is not present lol. Btw, my bike is just 6 months old. What seems to be the problem of my bike? Thanks in advance !!