sprocket prob

Discussion in 'Frame Mounted Engines' started by love1to1fish, Mar 9, 2009.

  1. love1to1fish

    love1to1fish New Member

    Hi all my sprocket to to big for my hube how can i fix it ? thx all :D

  2. biken stins

    biken stins Member

    What is the hub size and what is the hole size. May be a slice of pipe that meets the need. Is there any way or any place you could get it filled and drill it. Maybe put it on buy/sell/trade section. Good luck.
  3. love1to1fish

    love1to1fish New Member

    1 1/4 inch for hub and 1 3/8 for the sprocket
  4. biken stins

    biken stins Member

    All right it might not be to hard to fix. It is only 1/8". find a piece of pipe with a 1/8 " thick wall and cut it a bit more than the thickness of the sprocket. Use it as a spacer. I would tack it in with JB Weld or such. Good luck.
  5. bluegoatwoods

    bluegoatwoods Well-Known Member

    I can tell you what I did.

    I used the dust cap from the hub as a template. Drew a circle with a sharpie on the sprocket. Centered as close as my hands and eye could make it.

    Clamped the sprocket down to my work bench and started making one cut after another from the existing sprocket hole out to the line I had drawn. I don't remember, actually, whether I used my jig saw or my sawzall. Probably sawzall since this is a fairly big job for a cheap jig saw.

    Ended up with a hole that was "toothed". Ground and filed these teeth off with hand files and dremel tool until it fit over my hub.

    It's probably not perfectly centered, but I can't tell any difference.
  6. biken stins

    biken stins Member

    The hole in the sproket is to large as I understand it. Like maybe a coaster brake size hole going on a mountain bike hub.
    I just use the dremel like you if there to small.
  7. love1to1fish

    love1to1fish New Member

    thx all 4 the replys but i dont got use of a welder would rubber work it i clued it to the hub then clued sprocket to that?
  8. biken stins

    biken stins Member

    You just need to get it centered. You could whittle a piece of wood. The nuts and bolts keep it tight. So you could wrap a rubber strip around it to get it fairly centered. Then tap it into place.The key is get it centered. A good fit on hub helps to keep it from shifting up,down,back, and forth so the chain don't wobble off, curbs vibration and saves spokes. Use the bolts and nut to line sprocket so runs true. good luck.
  9. love1to1fish

    love1to1fish New Member

  10. Irish John

    Irish John Guest

    Actually from what you write below it is the opposite to what you wrote at first. The hub is too big for the sprocket by 1/8". I get a similar problem with the big geared hubs and I bought a circular drill bit that I can drill the correct size hole with on a drill press. It's not that expensive and saves drilling lots of small holes and then grinding it something that looks circular. I hope your clamp brackets will fit over yhe spoke flange because I had to make large ones of those to go over the big Nexus geared hubs which are pretty huge.
  11. love1to1fish

    love1to1fish New Member

    All working now i just had to center it thx all :cool:
  12. gubba

    gubba New Member


    i have install several 44 sprokets where the sproker hole is too big.
    install the sproket to the spokes centered eyeball close.
    tighten the nuts a little bit all the way around, and check to still be centered, then do the same thing over and over untill very tight.
    the proper hub is great but the way above will work. check the nuts for tightness every few hours of riding for awile. i have found that it does not have to be perfect, just close.

    stay dry

  13. Irish John

    Irish John Guest

    If the sprocket hole is too big you are lucky cos it allows you to centre it almost perfectly given that the sprockets aren't exactly round to begin with. Clamp it on loosely and spin the wheel looking at it from the side to see if sprocket wheel is bumping up & down. Tap it to adjust until it is at it's best and then tighten the clamp a bit more. The sideways deviations can be adjusted by tightening and untightening all the bolts later on but it helps if you tighten in a cross pattern to begin with. Your glue idea is a no go BTW.
  14. nsideus

    nsideus Guest

    This is what I use to align sprockets. You can check round and side to side.
    The piece of strapping is moved from edge of teeth to side. Also works for trueing wheels.

    Attached Files: