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Thread: Help Identifying Motor Sprocket Shaft (1960 FLH)

  1. Help Identifying Motor Sprocket Shaft (1960 FLH)

    Hello,

    First off...........there are better pictures if you scroll down. Sorry for the large size of them.

    Is there a way to verify a splined sprocket shaft based on the outside length? I just picked up this motor. It has a '60 left case but a '48-52 right side case (I believe). It is supposed to have 80" wheels in it, but I don't know what sprocket shaft it has.



    According to Palmer's, it could be '56-'71.




    In the photo above, the sprocket shaft on the 1960 sticks out 2-5/16"

    I have a 1949 (tapered shaft) and the same measurement is 1-13/16" (The 1960 shaft is 0.5" longer).

    According to Palmers, the difference between the '56-'64 shaft (4-15/16" long) and the '30-'54 shaft (4-9/16" long) is only .375"

    That's what makes me think it may somehow be a 1965 or newer shaft, which is longer.

    Hope all this makes some sense.

    Thanks
    Last edited by Herwiggy; 10-30-2019 at 12:39 PM.

  2. #2
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    Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    Those photobucket pictures are worthless. The sprocket shaft spacer for a '55-'64 engine is approximately 5/16 thick, this leaves just enough spline for the sprocket to attach without the nut bottoming on the shaft. A '65 up shaft uses a spacer approx 1/2 in thick to achieve the same. If you have a sprocket handy it is easy to tell which it is. It is generally east to see by just looking at it, but not in that picture held hostage by photobucket.
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  3. Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    Shaft_Splined by Mark Lobsinger, on Flickr
    Shafts by Mark Lobsinger, on Flickr
    Don't know if these photos will work or not. I started a Flickr account.

    I don't have the sprocket (motor came without one).
    Last edited by Herwiggy; 10-30-2019 at 12:38 PM.

  4. #4
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    Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    That isn't a '60 shaft, it looks like a late (70s ) type in that picture. Probably mated to a late gearbox with an open belt set-up in a previous life. And the seal is unscrewed for some reason.
    Last edited by Rubone; 10-30-2019 at 12:38 PM.
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  5. Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    I have no idea why the seal is unscrewed. I'm hoping that there isn't a clearance issue with it. I have not yet tried to screw it in further though.

    I found this information on the JIMs site:

    JimsSprocketShafts by Mark Lobsinger, on Flickr

    According to this, all motor sprocket shafts from 1970-1985 are 4.262" long (from bearing shoulder to end of small thread). Differences in taper, diameter, and keyway (or lack thereof).

    The reason I'm trying to find out what sprocket shaft I have is that I have a late model 4-speed transmission (12.470" main shaft) that I'd like to run. It's sounding like I won't have to replace the mainshaft in it with a shorter one, based on the existing motor shaft length.

    The only bummer is that I was hoping to run a tin primary cover on it, and don't know that one will fit.

  6. #6
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    Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    Are you planning to run a chain or a belt(and if so what width?) With a chain you can make a tin primary fit by putting a spacer on the engine case and moving the entire cover outboard. You would need to figure out how you plan to support the cover in the back.
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  7. Re: Help Identifying Motor Sprocket Shaft (1960 FLH)

    I'm planning on running a 530 chain. I suppose I could make some spacers to support the tin primary in the back, as long as it wasn't too much of a space to where it looked silly.

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