Jackshaft One Sided Jackshaft Type a Thing

Discussion in 'Transmission / Drivetrain' started by simonjohnwilmer, Nov 19, 2009.

  1. Im looking for info on how to mount two rear wheel pedal sprockets next to each other with enough room for the two chains , on the end of a Three pce BB shaft , this is so I can run two chains with a mid point for the double sprocket as low as possible , this will allow me to mount my engine quite a bit lower in the frame
    I have seen this or similar done on burritos and choppers , hope some one can give me some advice .

  2. junme

    junme New Member

    two cogs

    like this ?

    Attached Files:

    • cog0.jpg
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  3. Thats the sprocket set up I had in mind . but would that work for my application ? looks like a nice bit of equipment .I dont need to put anything on the end , the pedal crank is forward of this .
    Last edited: Nov 19, 2009
  4. junme

    junme New Member

    there track cogs that screw onto that bizo on the right that can be welded onto anything . Or could you use a rear axle ?
    not 100% clear on your setup :thinking:
  5. ibdennyak

    ibdennyak Guest

    Is that the thing that screws into the bottom bracket? I'm trying to do something similar on a Nu Vinci.....as soon as I figure out how to get the freewheel off. :confused:
  6. Whatever works ,I weld so thats no prob , I thought a three pce BB would be the tidiest to put the cogs on , and I can put the BB wherever it should go ,I think directly under the engine in my case .
    my setup is a chain off the pedal crank to the twin cog in the middle of the existing chain length ,then chain 2 to back wheel , its all just to lower my pedal chain line . no motor connection , thats on the other side as per usual.
    Last edited: Nov 20, 2009
  7. junme

    junme New Member

    they are the old coder pin crank cups same thread as free-wheel 1.375" x 24 tpi
  8. Coaster Hub

    I was thinking about cogs again , I put two Coaster cogs together with the offset on each facing the other , put them on the drive , Ill have to spot weld them on without the snap ring , put the hub back together without the drive ball and brake shoes and I have a nice compact idler to run the two chains like I wanted .
    Ill post photos when I have worked out how to fit it .