I got my first motorized bicycle about two years ago, before I knew much of anything about engines. I ended up stripping out the hole for the head bolt. We fixed that, but had to make a bolt that would fit. That bolt broke, and there was no place to buy another like it, so the bike just sat for about a year and a half, give or take. My dad and I finally fixed that bolt, and as soon as I get new rings for it, I can try to start it up! I'll try and keep everyone updated with this, so plan on seeing some pics and a video.