huasheng 49cc

The first time started my Huasheng 142f 49cc 4 stroke motorized bike, it ran perfectly just like I wanted to, the idle was super smooth and very quiet. But when I actually used it vibrated A LOT. I did some research online about it but I found nothing helpful that could answer my problem. Now...

I'm looking for MA approved engines / motorized bicycles. Currently, I'm trying to figure out if https://www.bicycle-engines.com/49cc-4g-t-belt-drive-complete-gas-powered-engine-kit/ will work. I'm confused by the big Non-Road Engine sticker on it. Also, I'm not sure how to reduce the top speed...

Hello Motor Bicycling.com I'm Matt, a new member to this forum, however I've been working at this motorized bike for close to 3 years now and I've only got it running a hand full of times unfortunately. First a little bit of background about the bike. I first purchased the Huasheng 4-Stroke...