Instructables
Picture of 80cc BICYCLE motorized ENGINE KIT
This kit will allow you to turn your bicycle into a gasoline powered motorbike! 1 Gallon of fuel runs 150 miles!! The engine is designed to be pedal/chain started so you can start or stop the engine while riding! Speeds up to 40mph. To install this kit you will need some basic skills using tools and a few hours. Follow the user manuals stated gas/oil mix and adjustments. This kit will fit many bikes sold in your local bike shops!

THE KIT I USED WAS SOLD BY BOYGOFAST ON EBAY AND THE PICTURES ARE FROM THE INSTRUCTIONS HE HAD EMAILED OUT.

HELP-FULL LINKS:
http://www.youtube.com/watch?feature=endscreen&v=bW8nAvOSntM&NR=1
http://www.youtube.com/watch?v=YJFyDYIkElI
 
Remove these adsRemove these ads by Signing Up

Step 1: INSTALLING REAR SPROCKET

Picture of INSTALLING REAR SPROCKET
Screen Shot 2012-11-18 at 8.37.12 AM.png
Screen Shot 2012-11-18 at 8.37.21 AM.png
Screen Shot 2012-11-18 at 8.37.34 AM.png
Screen Shot 2012-11-18 at 8.37.43 AM.png
STEP 1
There are two rear sprocket rubber packers. Cut one of them and only one. Cut only between the drilled holes.
STEP 2
Place the cut one inside of the spokes.
STEP 3
Place the other packer on the outside of the spokes.
STEP 4
Thread the nine bolts through the sprocket and use the half moon backing plates on the inside. Tighten all nine bolts moving across in a star fashion and a little at a time to allow for an even pull down. Once the sprocket is tight spin the wheel and check that the sprocket runs true.
Deviation can be no more than 1.5mm both ways. Any side-to-side excess deviation can be corrected by spinning the wheel and then tightening the sprocket where needed in order to get correct alignment. Make sure bolts are tight. Notice that concavity or indentation of teeth of the rear sprocket is inward towards spokes. This helps keep the chain closer to the inside of the wheel and spokes and allows for better clearance of the rear stays of the bicycle frame.
macpower7 months ago

I installed mine 2 months ago and LOVE it! I'm 2 1/2 miles up a dirt road and if it does get bogged down, which is rare, I just have to pedal a little bit to get me up the hill. You need to stay on top of it thought. Check all that maintenance stuff, double-nut your connections when you can and locktite when you can't. Always keep the tools with you to do a complete tear down and rebuild, and always wear a helmet.

yeeeeeap2 years ago
I had one of these motor kits once. It was so cheap, that the motor literally fell apart. All the taps for the holes in the crankcase stripped out, and there was even a casting flaw where there was a big hole in the crankcase. Ran like garbage, was unbalanced, extremely loud due to cheap aluminum case, and never idled right. Didnt even get 70 MPG. more like 30. Also never went faster than 27 MPH. Be old-fashoned. build your own motorbike. Stay away from this China garbage.
jrast362 (author)  yeeeeeap2 years ago
Thanks for the advice, but mine works great and aslong as you know what you are doing you can work around the problems.
Kiteman2 years ago
Warning: in the UK, this conversion will require you to:

> Have a full motorbike license, not a provisional
> Get an independent MOT check on the vehicle (they will probably require you to upgrade the brakes to motorbike quality)
> Have full insurance
> Fit proper license plates
> Wear a proper motorcycle helmet
> Install a full lighting system, including indicators and license-plate illumination