I have had my bike for about 6 months. A couple months ago I heard a loud bang/crack while riding, while examining my bike I noticed one of the nuts on the back mounting stud was lose, I tightened it. I then noticed the other side was lose, however when I tightened it the whole stud slipped out because it broke off of the engine body! However because I'm an impatient teenager with much resistance against spending money just tightened the front mounts and hoped for the best. For Christmas I got an expansion chamber, I finally got it running today and it was running great but later I noticed it was making a rattle noise and vibrated allot. When I checked it I saw one of the FRONT mounting studs was gone. What should I do now? I know there are some welding places around here but I don't want to pay an hourly rate of like 60 bucks to get two bolts welded onto my bike. And plus I lost one of the bolts on the road somewhere. Someone please help with any ideas? I will appreciate any advice very much, I'm sure you all know how frustrating it is to put so much time and money into your bike and have it continuously breaking :/. Thanks!