Vibration and Noise contol

Discussion in 'Motorized Bicycle General Discussion' started by georgeknight, Jan 23, 2009.

  1. georgeknight

    georgeknight New Member

    Joined:
    Sep 26, 2008
    Messages:
    34
    Likes Received:
    0
    I came up with a simple vibration and noise contol for my bike engine. I had a piece of 1/8 inch rubber belt that was used on a conveyor. I cut it to fit in between the mounts of the front and rear on my bike. I also took my clutch cover off and made a template of the inside. Then cut a piece of the rubber belt to fit inside. I had to cut a circle in the center to clear the clutch assy. Used contact cement to glue it in. After I let it dry over night I gave it a good test drive of about 135 miles. I don't have the clutch noise or the vibrating handle bars. I also don't have the bolts loosing up on my bike anymore. Hope this helps someone with their project...............George



    .bld.
     
  2. offroad

    offroad New Member

    Joined:
    Dec 31, 2008
    Messages:
    43
    Likes Received:
    0
    So hwo does this compare to the lead mounting as others have highly recommended? Some kind of strong impregnated rubber convayor belt material sounds interesting.

    How about rubber tire, from an old blown out tire. Has anyone done that already?? Is that the same as a conveyor belt?
     
  3. jasonh

    jasonh New Member

    Joined:
    Jun 23, 2008
    Messages:
    1,590
    Likes Received:
    0
    Any kind of harder rubber should be good.

    I personally used leather belt strips.
     
  4. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,308
    Likes Received:
    30
    I made a rubber gasket for my clutch cover a few weeks ago. I used 1/8" 'O' ring material. It really quieted the noise from that area. I don't have much vibration problem, but the clutch noise was no fun. Now it's nearly gone.
    Tom
     
  5. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    3
    Some glue a mouse pad to the outside of the cover.
     
  6. georgeknight

    georgeknight New Member

    Joined:
    Sep 26, 2008
    Messages:
    34
    Likes Received:
    0
    An old tire is basicly the same just thicker.

    George
     
  7. Michigan Mike

    Michigan Mike New Member

    Joined:
    Dec 9, 2008
    Messages:
    509
    Likes Received:
    0
    Hey Tom,
    Did you mount the rubber gasket on the inside or outside of the clutch cover?

    Does it matter?

    Thanks.....
    .trk.
     
  8. brian schunk

    brian schunk New Member

    Joined:
    Jan 24, 2009
    Messages:
    1
    Likes Received:
    0
    Well I have only had my bike a few weeks and I keep breaking the rear motor mount bolts. I also have put rubber on both mounts. My bolts keep loosening up or falling out. Can someone help me with this problem? George can you explain how you put rubber to quiet the clutch noise.
     
  9. Bikeguy Joe

    Bikeguy Joe Godfather of Motorized Bicycles

    Joined:
    Jan 8, 2008
    Messages:
    11,529
    Likes Received:
    3
    A lot of times, using rubber to mount the engine (or the wrong type of rubber) will agrevate the problem, hence your broken bolts.

    Use blue (medium strength) loctite to keep the bolts in.
     
  10. 2door

    2door Moderator
    Staff Member

    Joined:
    Sep 15, 2008
    Messages:
    16,308
    Likes Received:
    30
    The 'O' ring material went between the clutch cover and the engine. I used gasket adhesive to keep the rubber in place until the cover was installed. Don't get too aggressive when tightening the cover bolts or you'll defeat the purpose. Use Loctite and just tighten the bolts until snug. This decreased the clutch noise a lot.
    The sheet rubber, (mouse pad), glued to the outside of the cover apparently works too but I didn't like the appearance. 'O' ring material is available from Grainger. I used 1/8th inch; not much surface area for anything bigger.
    Tom
     
  11. Michigan Mike

    Michigan Mike New Member

    Joined:
    Dec 9, 2008
    Messages:
    509
    Likes Received:
    0
    Thanks for the tips Tom ... will keep them in mind.
    .trk.
     
  12. huckersteve

    huckersteve New Member

    Joined:
    May 20, 2008
    Messages:
    205
    Likes Received:
    0
    Icovered the outside of my clutch cover with heavy rubber using Gorilla Glue. I think it helped, now I want to do something on the inside too, maybe it will take it down further for me..

    Good thread. Keep the suggestions coming folks!
     
  13. Norman

    Norman LORD VADER Moderator
    Staff Member

    Joined:
    Jan 16, 2008
    Messages:
    2,605
    Likes Received:
    1
    hey I've been putting a heavy cork filled gasket material on the inside of the clutch cover using auto upholstery spray glue and this seems to quiet down the noise from the gears. I have also used contact cement with good results.
    This dampens the noise and you can't see it so if you don't want to spoil the look of that nice rough cast metal cover give it a try.
    You will maybe have to cut out clearance hole for the center of the clutch and for the small gear and I don't worry if it should come loose as the gears will eat it with out any problem except you will find a pile of shi under the cover but so far I haven't. Another thing a guy could try is the undercoating spray and do just the inside of the cover may not work but cheap and easy to do.
    something else to try spray foam insulation on the inside of the clutch cover then sand and carve out the excess.
    Norman
     
  14. bitsnpieces

    bitsnpieces New Member

    Joined:
    Dec 9, 2010
    Messages:
    195
    Likes Received:
    0
    Is it possible we can get a picture or two so I can see what you've described? Easier for me to understand as I'm not use too all the jargon and terminologies... :(
     
  15. tim turbo

    tim turbo Member

    Joined:
    Nov 18, 2009
    Messages:
    186
    Likes Received:
    0
    135 miles, really?
     
  16. bikesnipe

    bikesnipe New Member

    Joined:
    Nov 27, 2016
    Messages:
    8
    Likes Received:
    0
    First bike I built used rubber roofing for mounts worked great second bold did the same thing very bad vibration came home took rubber out no vibration I don't use rubber anymore
     

Share This Page