hey i recently picked up a pk 80cc engine kit and installed it on my bike. i followed the instructions on how to break it in properly and it has about 60 miles on it. the other day when i was out riding, about 3 mins into my ride, my muffler became very hot and feel off right above were the muffler becomes fatter. I rode it back home with the piece of muffler missing (it actually sounded alot better and also was giving me more pick up) the reason for me writing this is to find out while i wait for the replacement muffler to be shipped to me, is it safe to ride it now? i searched the forums too find out more detials but havent been able to find much, please post back what you think cause im DYING to ride it but dont wanta ruin the motor lol. thanks