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  1. #1

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    Default 83 shovel belt drive conversion

    Hi all. I've recently started my latest project, I bought a stockish 83 shovel and I'm putting the motor in a rigid frame. The bike had belt final drive which I want to convert to chain.. Now I know the trans pulley is wider than a sprocket so is it going to be an issue putting a sprocket on the longer main shaft? Or will something like an offset sprocket solve my issue?
    Any next question.. is there an easy way to pull this trans pulley now I have the trans out?? And what size is the nut?!
    Attached Thumbnails Attached Thumbnails 20190814_193856.jpg  

  2. #2
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    Quote Originally Posted by mudmane View Post
    Any next question.. is there an easy way to pull this trans pulley now I have the trans out?? And what size is the nut?!

    What does your Harley manual say?? It's in there.........

    You can pull the pulley off with your hand........... Just take the nut off............

  3. #3

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    The nut is a left hand thread. The hex is 1 7/8. There are specialty sockets available from several sources, or you can make one by extending a regular (six point) socket. On your '83, to switch to a chain sprocket, you need to change the seal spacer behind the main drive seal (and this may be a good time to change the seal) or use the sprocket shim used on the '80 - '81 chain drive models. You want to use the -80 series sprocket. With your original inner primary, there is room for an offset sprocket if you need it to clear a wide rear tire.

    Jim

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    Quote Originally Posted by Tattooo View Post
    What does your Harley manual say?? It's in there.........

    You can pull the pulley off with your hand........... Just take the nut off............
    Sorry didnt word my question very well. Now I have the trans out I cannot apply my rear brake so I can loosen the nut. How can I stop it spinning with the trans out? (Bike is in bits so I cannot put it back in)

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    This tool will do the job with a impact ...



    Made by Jims

  6. #6

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    Quote Originally Posted by JBinNC View Post
    The nut is a left hand thread. The hex is 1 7/8. There are specialty sockets available from several sources, or you can make one by extending a regular (six point) socket. On your '83, to switch to a chain sprocket, you need to change the seal spacer behind the main drive seal (and this may be a good time to change the seal) or use the sprocket shim used on the '80 - '81 chain drive models. You want to use the -80 series sprocket. With your original inner primary, there is room for an offset sprocket if you need it to clear a wide rear tire.

    Jim
    Thanks for the reply. So the shim sits behind the sprocket?? And what is the difference with the -80 series sprocket?

  7. #7

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    Quote Originally Posted by mudmane View Post
    Thanks for the reply. So the shim sits behind the sprocket?? And what is the difference with the -80 series sprocket?
    Yes, shim behind sprocket. It makes up for the difference in the belt drive seal spacer and the chain drive seal spacer. The -80 sprockets are flat on both sides, with no undercut like the earlier sprockets.

    Jim

  8. #8

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    If you don't have an impact wrench, you can take the top off the transmission and engage two gears to keep the main drive gear from turning. Don't lose the shift fork rollers when you do this. This is also one way to torque the nut with the transmission on the bench.

    Jim

  9. #9

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    Quote Originally Posted by JBinNC View Post
    Yes, shim behind sprocket. It makes up for the difference in the belt drive seal spacer and the chain drive seal spacer. The -80 sprockets are flat on both sides, with no undercut like the earlier sprockets.

    Jim
    I have found a transmission sprocket spacer 1.2mm thick online. Does this sound about right?

  10. #10

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    Quote Originally Posted by mudmane View Post
    I have found a transmission sprocket spacer 1.2mm thick online. Does this sound about right?
    Yes, should have a -80 part #.

    Jim

  11. #11

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    Quote Originally Posted by JBinNC View Post
    Yes, should have a -80 part #.

    Jim
    Yeah it does. Thanks

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    I use a visegrip chain clamp to restrain the pulley for nut removal in such cases.

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    Why not just stick that big ass pulley in a vice??????

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    Tattoo ....

    Have you ever shoed a horse ... ?? ...

    An Irishman applied for a job working with the local blacksmith.

    “Have you ever shoed horses?” the blacksmith asked him.

    “No,” replied the Irishman, “but I did tell a donkey to f... off once.”

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    Quote Originally Posted by Dragstews View Post
    Tattoo ....

    Have you ever shoed a horse ... ?? ...

    An Irishman applied for a job working with the local blacksmith.

    “Have you ever shoed horses?” the blacksmith asked him.

    “No,” replied the Irishman, “but I did tell a donkey to f... off once.”
    Why do you need a horse shoed????????? LOL

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