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Thread: drive sprocket replacement

  1. #1
    Senior Member drive sprocket replacement StratTuner's Avatar
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    drive sprocket replacement

    What is the easiest way to remove the drive sprocket?

    How do I stop it from turning so I can wrench off the center bolt that holds it on?

    I've got the old chain off, the rear wheel with new sprocket ON.

    I don't remember how I ever stopped the front sprocket from turning when I don't want it to.....

    Does that bolt loosen when turned LEFT? orrr.... loosen when turned RIGHT?
    Last edited by StratTuner; 9th May 2018 at 15:18.
    - StratTuner
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  2. #2
    Senior Member drive sprocket replacement StratTuner's Avatar
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    help. I am in STUCK-LAND again...
    - StratTuner
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    "If you don't understand him, and he don't die young,
    he'll probly just ride away."
    - Willie Nelson

  3. #3
    Super Moderator drive sprocket replacement 670cc's Avatar
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    I haven’t changed a front sprocket yet on the NC, but I did on my old Ninja 250. My thought would be to loosen the sprocket nut first, before removing the chain and rear wheel. You could lock up the rear wheel with a piece of wood. This would be along the same lines as loosening your car wheel lug nuts before you jack up the car.

    Is it possible for you to temporarily install the chain so you can use it and the rear wheel to hold the front sprocket?
    Last edited by 670cc; 9th May 2018 at 15:45.
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  4. #4
    Senior Member drive sprocket replacement StratTuner's Avatar
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    Quote Originally Posted by 670cc View Post
    I haven’t changed a front sprocket yet on the NC, but my first thought would be to loosen the sprocket nut first, before removing the chain and rear wheel. You could lock up the rear wheel with a piece of wood. This would be along the same lines as loosening your car wheel lug nuts before you jack up the car.

    Is is it possible for you to temporarily install the chain so you can use it to hold the sprocket?
    Yes, I put the old chain back on and fixed it so the rear wheel can not turn. (wrench through spokes braced on swing arm).

    It feels like I'm going to strip it out if I crank on it any harder. It's only supposed to be 40lbs tight...
    but if I'm turning it left when it needs right, I'm just making it worse.
    - StratTuner
    NC700XFJR1300

    "If you don't understand him, and he don't die young,
    he'll probly just ride away."
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  5. #5
    Senior Member drive sprocket replacement StratTuner's Avatar
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    Does that bolt LOOSEN LEFT.....or Right?
    - StratTuner
    NC700XFJR1300

    "If you don't understand him, and he don't die young,
    he'll probly just ride away."
    - Willie Nelson

  6. #6
    Senior Member drive sprocket replacement StratTuner's Avatar
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    OK.... it came off....but whatever mechanic put it on last, put it on with a lot more than 40lbs torque!

    I hade to use the wrench that more than a foot long and made for really difficult items.

    I am no mechanic.... I have no business doing this.
    - StratTuner
    NC700XFJR1300

    "If you don't understand him, and he don't die young,
    he'll probly just ride away."
    - Willie Nelson

  7. #7
    Super Moderator drive sprocket replacement 670cc's Avatar
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    Quote Originally Posted by StratTuner View Post
    I am no mechanic.... I have no business doing this.
    I fixed things for a living. Importantant things. Many, many times you don’t know what you’re doing. You try something that seems logical. If that doesn’t work, you try something else. Eventually you find a solution. It’s not all just layed out for the mechanics, either. They often struggle just as you did. You learn a little more each time you try.
    Last edited by 670cc; 10th May 2018 at 04:02.
    Greg
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  8. #8
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    Quote Originally Posted by 670cc View Post
    I fixed things for a living for 40 years. Importantant things. Many, many times you don’t know what you’re doing. You try something that seems logical. If that doesn’t work, you try something else. Eventually you find a solution. It’s not all just layed out for the mechanics, either. They often struggle just as you did. You learn a little more each time you try.
    +1.

    Hell, I just replaced the condenser on my car's AC system. Never done that before. Still works, three days later, too!

  9. #9
    Senior Member Wildfire's Avatar
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    I also had to use a breaker bar to loosen the nut for the front sprocket. Maybe the same 200 pound gorilla tightened both of ours at assembly.

  10. #10
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    Quote Originally Posted by Wildfire View Post
    Maybe the same 200 pound gorilla tightened both of ours at assembly.
    Fasteners are not tightened by hand at the factory. There is special tooling that tightens them to specific torque settings.

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