rubber engine mounts

Discussion in 'Frame Mounted Engines' started by metnut1961, Jul 23, 2013.

  1. metnut1961

    metnut1961 New Member

    Hi everyone!
    I'm a newbie, so this question might seem kind of stupid, but here goes. Where does a person find rubber to wrap around a bike frame before mounting to help reduce vibration? (66cc, 2 stroke, murray cruiser bike).
    Thanks,
    Ray C
     

  2. birdmannn101

    birdmannn101 Member

    Ray, old rubber inner tubes work well.
     
    metnut1961 likes this.
  3. Big Red

    Big Red Active Member

    Any long time experienced builder will tell you that rubber mounts will only INCREASE vibration. I've tried all types of rubber mounting, especially when I was a newby. It only lets the engine move around more and will let it vibrate more. A good, SOLID metal to mount is the only way to go.
    BUT, I've only been building bikes for around 10 years with over 100 builds behind me, What do I know. If you would like a second opinion from another experienced builder, Check out KCvale. He is Very experienced and knowledgable.
    Big Red.
     
  4. Big Red

    Big Red Active Member

    I've tried the old inner tube thing birdmannn, It's too soft. Now if you could find some kind of REAL HARD rubber you MIGHT have a better chance of making it work. The reason Honda motorcycles can get away with it is because they use more than two mount points, AND a very hard rubber. Only two mount points doesn't give it enough points to make it a solid mount. Metal to metal is still the best so far, Untill someone comes up with something better anyway.
    Big Red.
     
    metnut1961 likes this.
  5. metnut1961

    metnut1961 New Member

    Rubber Mounting

    Thanks for the info-makes sense to me...
    Ray C
     
  6. metnut1961

    metnut1961 New Member

    Thanks very much-doesn't sound like rubber is the way to go...
    Ray C
     
  7. birdmannn101

    birdmannn101 Member

    Now Ray, you really need to listen to Big Red because he knows what he is talking about. Heck, that is why Harley-Davidson put all their rubber under their engines to keep them from shaking you off the bike. Really, I have never used rubber to reduce vibration Ray. I just built a 4 stroke with the HF 79 engine and my balls don't feel like they did when I ran that 2 stroker. You know Big Red... After I told Ray about the inner tubes I thought that I should have told him what happens when the engine doesn't have a ground in case he needs it.
     
  8. Big Red

    Big Red Active Member

    If yer talking about an electrical groung birdmannn, he probably won't need one unless he tries to run somwthing off the white wire. MOST of the time, the white wire only draws power from the engine and makes the bike run like crap. There are a couple people that have it figured out I think. Sgt. Howard comes to mind. But ya can't just hook up a light straight from the wire and expect it to work right. Check out the Home Depot headlight. It draws very little from the white wire.
    http://www.motoredbikes.com/showthread.php?39474-5-Home-Depot-headlight-revisited
    Big Red.
     
  9. birdmannn101

    birdmannn101 Member

    That light is great. I love the pictures he supplied. If I had my 2 stroker I might even think about using that white wire.

    I sure wish that I could find someone that has a dyna hub running on the wheel and some schematics for for lights, battery and rectifyer.

    Ooops! Before I get chewed out for ruining metnuts thread on "rubber motor mounts" better run....
     
  10. Big Red

    Big Red Active Member

    It's cool birdmannn, I think everyone got the point about rubber mounting. So this thread is probably dead anyway.
    Big Red.
     
  11. HeadSmess

    HeadSmess Well-Known Member

    its not so much the rubber as the location and lack of the mounts that makes rubber impractical.

    properly spaced 4 point support and rubber bushes would work great :)



    as it stands...nope. no rubber. nasty stuff.
     
  12. metalzombievi

    metalzombievi Member

    i know this is a couple of years late, but i use some leather strips as padding for my motor. it does asorb some of the vibrations well, but theyre still there. not as bad as with the inner tubes or just metal on metal and they seem to hold up well. i have over 100 miles with the leather and it hasnt been burnt or ripped appart.
     
  13. butre

    butre Well-Known Member

    100 miles isn't very far. what you have to worry about is the engine studs breaking, not the leather being damaged.
     
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