Motorized Bicycle – Part 2

Part 2 of 3 in a video series on the build of a motorized bicycle.

This second video covers:

  1. Installing the sprocket on the rear wheel
  2. Installing the carburetor
  3. Installing the chain

Watch Part 3 on building a motorized bicycle.


  1. Jaime Vaca
    February 15th, 2010 at 15:01 | #1

    Hi maybe you have some like as “How install a Shifter Kit or Jackshaft Kit”.


    Best regards

  2. February 15th, 2010 at 15:07 | #2

    I haven’t installed either kit before, but if I do… Ill be sure to post of video of the process.

  3. brian
    March 7th, 2010 at 20:12 | #3

    Hay dude you should totally join this forum im not spamming or advertising this fourm. It is dedicated to all motor bicycling Builders and riders. So yea dude join the fourm and nice bike!!!


  4. kevin s.
    May 15th, 2010 at 11:53 | #4

    wow; great diy site; i have you bookmarked. Do you take requests for video’s? . i desperately need to see someone actually modeling the installation of the rear sprocket; i refer to part 2/3 on your motorized bike video. in that video in the segment on the chain, at point 3mins., you say how the chain was out of alignment and you would have to fiddle with the sprocket some more to get it right. I am hoping you can do a “fiddling” video:) specifically the way you make that crazy “rag joint” sprocket concentric or true. i have mine on for a four stroke mount so i put the teeth out with the three half moon washers against the inside of the spr. , then one of the rubber spacers then through the spokes into the other “cut” rubber spacer and the two half moon washers and then the nuts..
    my wheel is spinning on the bike where i have a fixed rod touching the sprocket and i’m trying to loosen and tighten my way to concentricity to no avail. it’s running in and out like crazy; also measured from the rim to the teeth and i’m a 1/16 off there.

    please do a video of this or write back and give me an easy way to accomplish this if you can find it in your heart to do so; this phase is holding up my show. try and imagine you do not have all those fantastic tools in your awesome shop to work with:)

    to help myself, i replaced the china bolts with american standard and nylock nuts.

    hoping you will help,

  5. May 15th, 2010 at 16:39 | #5

    Thanks Kevin. Sorry, I no longer have this engine kit on my bike. I’m planning to install my honda tiller’s 4 cycle motor on my bike with a friction drive. I prefer the smoother and more reliable honda engine. Check with the guys at these forums… they should be able to provide some good advice on your problem. I never got mine perfect either.

  6. May 19th, 2010 at 11:59 | #6

    [...] chain? I need to figure out how to put my chain on. I’ve watched this video here Panofish Blog Motorized Bicycle – Part 2 and he shows how to punch out the chain piece and remove links. I don’t have the chain punch he has [...]

  7. May 19th, 2010 at 12:17 | #7

    Any cheap punch will work, like these:

    And a block of wood with a hole that has a diameter close to the diameter of the pin being removed from the chain. Then, put the chain with pin to be removed over the hole and hit the pin with a punch and hammer. It only takes a few solid raps with the hammer.

  8. pat
    June 13th, 2010 at 10:34 | #8

    hey alan…i was curious about the kill switch wiring hookup. i has recently built my motorized bike, and was not too sure on what i was doing wrong. i tried watching your 3 part video, and could see how you wired your setup. perhaps my ground(green wire for this model) relaying from the kill switch has bad connection. im not too sure if i need to screw it on frame or what? any intel you might share would be awesome.
    p.s. props on the workshop

  9. Troy Cados
    August 19th, 2010 at 05:44 | #9

    Hi, I am finding your videos very informative as I am putting the same motor on my bike. I am running into a couple of problems however.
    What kind of chain is that? My set didnt come with a chain as my friend gave it to me for free. A normal single speed bike chain fits around the sprocket on the rear wheel but not on the engine sprocket. What size is the chain and where should i look to find it? Also, the sprocket on my engine doesn’t move freely even when move around the clutch lever. is this normal? Thanks!

  10. Derek
    December 7th, 2010 at 02:27 | #10

    hello, i have a 66cc engine from and 1 of the teeth on the small sprocket on the motor broke so i have a new 1 coming. im not sure how to take the old 1 off do you know? if so please let me know i would hate to get over charged by a mechanic.

  1. January 28th, 2010 at 15:19 | #1
  2. May 16th, 2010 at 21:25 | #2
If you want a pic to show with your comment, get a gravatar!