I just finished my first build. It's an aluminum Sun Cruiser w/ a 49cc 2-stroke engine. Needed a helping hand from my local machine shop to fabricate an mounting bracket to allow for my extended frame and bend the exhaust to allow for pedal clearance. Thinking about swapping the stock boygofast chain tensioner for something more sturdy. Any ideas out there? Thanks for the feedback, this is my first motored bike, forum post, and album so I am excited to hear back from some fellow aficionados.