my 49cc modification/build thread

Last night I tore my engine down and port matched the intake and exhaust and cleaned up the ports, the hole in the intake gasket was probably half the size of the actual port. The base gasket covered probably 1/3 of the transfer port and there was a nasty casting lip where they enter the cylinder that I had to remove. I also sanded down the head mating surface til about half the raised lip was gone and I halfass sidegapped the plug and ground the the strap to a point. I just took her for a test drive and I noticed an increase in power across the board but particuly in the lowend and she also revs much more quickly but I think ill need to tune the carb a little and possibly jet up a size or two. I wouldnt say she runs like a raped ape yet but the gorilla has definitely been touched in an inappropriate way. Thank you to bikenut for your thread on how to reinstall the cylinder, I was having a **** of a time putting the piston in the cylinder u til I saw on there that there are pins in the ring lands that I had to align to.


Things to come: larger sproket, I had planned to go to a 56 from my 44 but someone recommend that I go with a 48 and that would provide a noticeable increase In pulling power withojt sacradicing too much speed but im only shooting for 25mph and the ability to climb all the hills around me.

The pipe I currently have is approximately 12-16 inches of header then a small expansion chamber then more small pipe followed by a coke can sized muffler, I had planned to buy an x chamber but from what ive read the setup I have is ideal for lowend torque but im not sure what im going to do.

I found some v brakes including the movable portion that pinches the wheel, the cablea, and he levers for 25$ so ill do that out if my nexr check for sure.

Im looking for a generaror and headlighr but all the ones I find online say they wont live at speeds above 15-20. Suggestions and advice will be appreciated.

Im very forgetful and would never remember to keep my batteries fresh and I have to be at work at 4am so a headlight is a must. I figure ill wire up a 6v powerwheel battery to the generator and hook the light to it so that I build a charge at higher speeds and still have light when im stopped

http://m.ebay.com/itm?itemId=310893210738 just ordered these and will report back on my results.

Is this a good headlight? I saw that it originally sold for 80 and the reviews are positive when a diffuser lens is added.

http://www.amazon.com/gp/aw/d/B005WPFVPC/ref=aw_ls__1?colid=2DJCX26KXVJ6S&coliid=I1EM4A5H4CKEAP sorry about that, is this headlight any good? The reviews are moatly positive but that doesnt always mean much.

Ithanks for the input map Ill be picking that up soon, it was just hard to beleive quality could be had at that price

The brakes came today but they wont work on the back because they are a little short and grip the tire instead of the rim even when I adjust the angle of the pads.

Sorry I didnt post back but Ive been busy and pissed. I ended up mounting the caliper under that small crossbar instead of on top and it lined it up perfectly, unfortunatly on her first safe ride I threw the engine drive chain and it caught between the sproket and wheel and bent my wheel pretty badly. I was having trouble keeping to rear wheel centered between the rear triangular bars and the front of the wheel kept wanting to move left so I know what caused it I just dont know why it wouldnt stay centered and straight. I will either be getting a new wheel from a local guy from craigslist tommorow depending what he has in his spare parts or ill order one in a few days and try to figure out what was causing the issue.