Sounds like something good to try, a new chain with 4.9 star reviews is only $17 or so on Amazon. Everything that comes with these Chinese kits is terrible, I mean at this point the only thing I haven't scrapped or modified is the throttle and clutch cables, engine block + internals, chain, chain tensioner, and carburetor intake
. I wonder if anyone would sell maybe a $200 or $150 kit with better quality parts/engine itself. The $100 Chinagirl is an excellent starter kit for someone like me a few months ago before I got into the hobby but I'm hesitant to build another motorized bicycle (even though the one I have now is almost perfected for my needs after 3+ months of work) knowing that I'll replace/modify at least half of the parts to make it decent. That's probably $50 in miscellaneous parts right there and a week of work. Another $50-60 to make it really rip (my experience). The issue is this large disparity between the low end and high end kits. If you have knowledge and experience with custom fabrication, it would be awesome to buy a predator 79cc or some similar engine and mount it on the bike. But most of us can't do that at the moment. So we have to buy engines designed for a bike instead of designing a bike around an engine. I think if some company sold decent quality 2 stroke engine kits for $150-200 dollars (not saying that engine needs to produce more power, just needs to be more reliable and higher quality...) people who are looking to build a second MB would purchase them. Save the $800 down the road for your 4th of 5th build lol. And I do understand the fun of rebuilding and modifying the Chinese motor kits, that's why most of us are here. Few people build/rides motorized bikes for serious use as a daily transportation vehicle, or so I think. We all enjoy building and riding these unique half-motorcycles and half-bicycles, or it wouldn't be worth the trouble. I mean the kit I got for $100 off eBay came with holes in the box when it was delivered, half the parts weren't adjusted properly, the head was loose, the exhaust pipe screws wouldn't even screw all the way into the hole...you know the story. I'm wondering if anyone else here would be willing to purchase a "medium end" MB kit that resolves these issues for around $150. Let me know what you think!