Kings Belt Drive

Discussion in 'General Questions' started by nweiner, Sep 3, 2007.

  1. nweiner

    nweiner Guest

    Can the Kings engine accept a belt drive system? I can easily design and build a rearend to accept belt drive, but am unsure about the engine. If anybody has done please. Thanks

  2. Jim H

    Jim H Guest

    That would be interesting! Can't recall seeing that anywhere here, I'll take a stroll through the search out of curiosity.
  3. gone_fishin

    gone_fishin Guest

    do you mean actually convert from sprocket to pulley on the output shaft?

    that would be a neat tweak. i believe belt-drive is the drive of the future, no matter the mounting-style.
  4. nweiner

    nweiner Guest

    yes, make a pulley on the output shaft. I guess I could take a sprocket and grind off the teeth and machine a pulley to slide over and tighten on the ground down sprocket. The chain creates so much noise that belt drive might be pretty cool. The problem is the belt will have to be skinny and might be too weak.
  5. Jim H

    Jim H Guest

    It would need a vbelt or a heavier toothed belt than a gebe. I'm sure it's doable by some of the guys here.
  6. chaining up the belts!

    Hey, Amigo, it CAN be easy to do belt drive, just make a jackshaft, chain it to the engine, and belt it to the wheel! a little well-aligned chain will not make much noise, and the belt-drive is nice and quiet, and sucks up a bunch of the drive-systems "out of round" vibration. You can shim the engine forward to adjust the front chain, and use a spring loaded Idler pulley to take up rear slack. Many opportunities to select a gear ratio this way, tho very few sheaves are factory made anymore. I use Whizzer.

  7. ironwarlock

    ironwarlock Guest

    there would be no problem going belt drive off that motor. you could go v belt or timing belt. belt is so much smoother then chain.
    Last edited by a moderator: Sep 3, 2007
  8. nweiner

    nweiner Guest

    I want to stay away from using a jackshaft because I like the simplicity of a straight chain. I will try mating a belt pully to a sprocket and let you know how it goes. It would be pretty cool to have a belt driven cruiser. Just one more thing to make my bike a little different.
  9. nweiner

    nweiner Guest

    what materials other than metals would be okay to make pulleys out of. I have acces to autoCAD software and a lasercamm (2-d laser cutting machine) at my University and would be able to make exact fit pieces.
  10. ironwarlock

    ironwarlock Guest

    Man if I had access to that cutter. I could make a sweet sweet drive.:smile:
    For starts I would grab a chunk of aluminum and make a one piece rear wheel with the belt track on it (one piece).If I was you I would hit the cad program and go to town.
    Last edited by a moderator: Sep 3, 2007
  11. nweiner

    nweiner Guest

    Does anybody have an extra drive sprocket that I can tool around with?
    Maybe and old and worn one or one from a blown motor.
  12. R&D

    R&D Guest

    check with carbon drive for belt drive they have Gates belts designed for bikes.
  13. gone_fishin

    gone_fishin Guest

  14. MtnGoat

    MtnGoat Guest

    What's the shaft diameter?

    What's the drive shaft diameter of that King's engine? Maybe a stock pulley would fit.
  15. Haggard

    Haggard Guest

    I f you try to go belt without a jack shaft or reduction box, your gear ratio is going to be wayyy outta wack unless you use a rear pully about the size of the rear tire and/or a front pulley so small `(2'') that it will slip no matter how tightly adjusted..
    These are facts not assumptions.

    Heres a solution :

    Theres other solutions . this is just my solution

    leave your drivesprocket where it is.
    remove your reat sprocket
    get a 5 inch pulley (steel, aluminum is pretty but it will fail)
    get one witha center hub or you will be buiyong one and welding it on
    get a 10 '' axle to fit the pulley and 2 bolt down steady bearings ,
    get a 10 inch pulley and mount to rear wheel the way you did the sprocket but you will have to make the the mounting hardware
    or make a tight fitting disk that sits just inside the rim and both that to rings on other side of spokes . make the rings . this puts all the pressure on the spoke tighteners instad of just the spokes
    mount your axle bearings to a rack use spacers to align your sprocket 'pulley combo up . install belt and chain and have fun.

    drill and moumt your pulley and sprocket together using a 1/4 '' spacer between .
    make the spacer smaller than the sprocket so to aloww for chain clearance.
    the concavity of your sprocket wikk determine how wide a spacer you need. aslong as you end up with approx 1'4 inch when they are mounted
    Last edited by a moderator: Nov 29, 2007
  16. Haggard

    Haggard Guest

    a couple more pics of belt drives i've built

    Attached Files:

  17. gone_fishin

    gone_fishin Guest

    yup...the "jackshaft" is the perfect place to make final gearing adjustments, too :)

    man, those bike's are lookin' mighty haggard ;)
    (blast from the past? hehe)
    "....Get a bicycle. You will not regret it. If you live." - Mark Twain
    Last edited by a moderator: Dec 15, 2015
  18. Bean Oil

    Bean Oil Guest


    What's the difference between a sprocket and a toothed or smooth pulley?

    It's their diameters that count as far as gear reduction goes.

    Lemme know if I'm missing something here. LOL.

  19. Dockspa1

    Dockspa1 Guest

    You are right Bean oil, Its only the touching diameters that count so you can stay with the same size pullies as the sprockets. Rmember, the happy times are already reduced 4:1 on the gearing.
  20. gone_fishin

    gone_fishin Guest

    second that...gearing isn't really about gears at all.

    about using belt on a happy-time: if i was going that route, i'd get some Golden Eagle components and play around...small drive gears that could be adapted to output shaft, very flexible but strong belt, etc...
    "....Get a bicycle. You will not regret it. If you live." - Mark Twain
    Last edited by a moderator: Dec 15, 2015