A lot of Vibration at medium throttle.

Discussion in '2-Stroke Engines' started by StrontiumEthics, Jul 24, 2010.

  1. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    I just built a new motorized bicycle using a black slant head. Sofar everything is mounted up nice and snug, and aligned. However out of curiosity I wanted to go full throttle on my new engine after about 1 tank of gas at 20:1 Ratio of Honda GN2 2 stroke oil. Speed and pickup is great but there is a lot of vibration around half throttle but it then dies away at full throttle. I thought that maybe the aluminum frame is the culprit, but I would like a second opinion...
     

  2. Fulltimer

    Fulltimer Member

    Mine does it at about 5mph and goes away when I speed up. I think we both have gremlins!:grin5:

    Terry
     
  3. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    Lol.Ahhhhh.... How do I get rid of the little engine gremlins!!!
     
  4. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    I doubt thats good for our Jimmy's!
     
  5. professor

    professor Active Member

    You are probably in a resonate frequency. All mechanical stuff vibrates at frequencys. It could well be the frame being excited at that engine rpm. Try tieing it down better.
     
  6. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    My new build

    Here is a picture of my new built. I hope I resized it correctly. Tell me what you guys think. = )
     

    Attached Files:

  7. Vistaman73

    Vistaman73 Member

    It looks great! What size frame and wheels is that?
     
  8. StrontiumEthics

    StrontiumEthics Motored Bikes Sponsor

    I'm not to sure about the frame size I believe its 27", and the wheels are 26"
     
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