Get a better pipe low end pipe those boss pipes suck for low end torque, good chance the “dealer” kept original hi gearing which over-revs stock crankshaft, it’s not timed/tuned for cool tuning or protected with temp gauge as well as probably not serviced wheel bearing and brakes so you may be riding on borrowed time
Mopeds are DIY so learning to time/tune and set up your bike for reliability as well as good speed and takeoff is a must
A dealer who just slaps something on doesn't it live with the bike everyday. You can’t go there for every little issue like adjusting your chain which going to be doing shortly, spark plug, ignition maintenance/timing or for big issues like changing cylinders and exhaust pipes and gearing,
Read up on everything puch, experiment and have fun !