• Register now! It's free and easy.
  • Show your bike to the world, upload a photo today!
  • Hi Guest, did you know we have a dark style? It might be easier on the eyes at night time! Try it out here: Style Chooser


  1. C

    How to set up 4 stroke carburetor - what do these hoses do?/how do I hook up these hoses on my engine

    Hi, I am new to building motorized bicycles, but have been doing fairly well following the instructions and finding information for my first build, but I have been unable to find information regarding the carburetor for my engine. I have added pictures with my questions, I hope they will be...
  2. T

    Quick Question!

    when I pull in my clutch lever, this screw doesn't extend far enough to lift the clutch cover off of the pads. is it too long? solutions?
  3. B

    Quick spark plug question

    I have an 80cc that when i go on a lengthy ride it vibrates the spark plug loose can anyone tell me why it's doing that and maybe what ti do t to make it quit thanks
  4. N

    Is my bike motorizable

    I have carraro crp690 and i wonder if it is motorizable. https://carrarobisiklet.com/dag-bisikletleri/carraro-crp-690-erkek-dag-27-v-hd-26/ here the link of bike. It has hydraulic disc brake and 26 inch wheeles. Frame size is 18inch.
  5. You need people like me.

    Hello do you think this is a good deal??

    https://www.ebay.com/i/301650176773 Its 65 dollars, but im not sure if itll chooch like i the old one. I already have a pk80 engine kit from seeutek on amazon its been pretty good till i broke it doing amature work on. It now im looking for a new motor. Anyhelp would be greatly appreciated.Thanks