My horrendous experience with BoyGoFast

It all started Christmas of 2011, the day I get my BoyGoFast "80cc" (actually 60cc, called in 80cc. Do you guys call a 60c engine an 80cc, because in the instructions it says that that's what the motor bike community calls them?)

I managed to understand the horridly translated instructions, sometimes it would take a few mistakes to understand something, but all in all, the build wasn't that tough. There were no wiring diagrams or instructions, and that took more internet surfing. So then I get it running a few days after Christmas, and when I have some free time. Runs fine for the few times I ran it. The only thing I complained about then was the clutch, and how it over revved itself, causing it to shut off, even though I had adjusted the clutch. After about a month of test runs, maybe 2 months, I decide to go a 4 mile distance. A little over halfway, the rear sprocket comes loose, causing the master link to fly off, and about 6 of my spokes to pop. I walk the 2 miles back to my house, and take it off the bike. There it sits for another month or 2 while a find a good donor bike, one nice and strong. I install it, run it, and it started making a very high-pitched squeal, and would not run. After more googling, I found out the gasket wasn't tight enough. It wasn't because they weren't tight, it was because one of the head bolts. They hadn't even threaded it. This was where my dad and I had to decide, get an over-sized bolt, or get a new case. We decided to get a new case. Worst idea ever. We order one of around 27 bucks, plus 1 shipping, and another 5 dollar gear cover, because they left a loose screw on one of he worm gears, so it broke right through the case. Anyways, the case comes, and we take the motor completely apart. The first thing we noticed about the crank case was the head bolts being smaller than the original. We get all the bearings in, and put the crank arm and counterweights in, and guess what! It didn't fit! The case that was supposed to be the same as the old one couldn't fit the counterweights inside! But the horrors not over! My dad starts to carefully take a bearing out, and the case breaks ON THE OTHER SIDE of bearing, not even close to it! now were deciding what to do, because we've spend close to 200 bucks, and it's just not worth it. Moral of this story, even if you want a cheap, learners bike motor that has some quality to it, don't get BoyGoFast

But the fact that they shipped a wrong part labelled that it would work for any of the 80 cc's is what im POed about

Okay, I have read all of your comments, And there is some stuff I agree with, such as the whole instructions argument. What I failed to mention in the first post of mine was that I DID do a very well check over the engine before we put it on. My dad, who has taken numerous 2 cycle, and 4 cycle, engines apart, helped with this. We tightened the head bolts, except that one non-drilled one, and all of the other ones. ran test ones, and ran it at very low speed. The clutch had been adjusted in pretty much every fashion available, and the over-revving would not stop. A hammer was not involved in the bearings, either. Also, as for the Google Docs page; I did not find that during the winter break that I had, that entire week I was googling all the details I could get. I read a few performance and tuning tips, but nothing too much. I also learned from this, first 2 cycle completely torn down, dealing with over sizing a bolt, and so forth.

This was also not my first motorized bike. My first was a weed eater powered bike, so was the second, both friction drive, and ran awesomely. Second was used during science fair, even though the school decided not to put it out because it was too "dangerous" and didnt want kids getting the wrong idea. This was ironic because right next to me was a high powered potato cannon.

All in all, What I should really say if this: To me, It seems like a wolf in sheep's clothing. Everything on the inside, with a few exceptions, seems to run well. But, the quality of the casing is what I don't like. Anyways, I am going to try and put a Helicoil into the case, get an oversize bolt, and see what happens. My dad may try and get parts to put into the spare (but slightly broken) case. If anyone wants any pictures, I'd be happy to put them up.