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Thread: Piece of Aluminum found in old oil

  1. #11
    Junior Member spenzher's Avatar
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    So I got the side covers off and it's exactly as some of you have said. Just a pinch off the side rail on the rotor. That being said it looks like that's the only damage. Not sure why that would happen but I'm going to get it off just to inspect and probably replace. I will update if I find anything else. Piece of Aluminum found in old oil-20190521_132808_1558460439491.jpg

  2. #12
    Junior Member spenzher's Avatar
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    Quote Originally Posted by 76TWIN View Post
    I would first take a look at the damage on the rotor.
    Depending whether you intend to use the electric starter or not and the damage on the rotor, you could just leave it as is and just use the kick starter.

    Removing the rotor is a simple matter of finding the correct size long bolt (probably a 16 mm bolt with 1.0 pitch)
    I'm planning on just using the kicker as the starter is toast right now. Now I'm just curious why the rotor would break off like that.

  3. #13
    Senior Member ancientdad's Avatar
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    It either happened as a result of previous starter clutch looseness on the rotor (when the 3 screws come loose and the outer clutch housing is allowed to move around too much) and only finally broke free recently, or it is because the screws are loose now - probably something you should really check into before assuming all is well, regardless if the starter clutch seems to be working properly or not. When you say the starter is "toast", is the starter motor turning but the engine isn't?
    Tom

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  5. #14
    Junior Member spenzher's Avatar
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    Quote Originally Posted by ancientdad View Post
    It either happened as a result of previous starter clutch looseness on the rotor (when the 3 screws come loose and the outer clutch housing is allowed to move around too much) and only finally broke free recently, or it is because the screws are loose now - probably something you should really check into before assuming all is well, regardless if the starter clutch seems to be working properly or not. When you say the starter is "toast", is the starter motor turning but the engine isn't?
    I'm getting no response, solenoid is working and providing juice, thats as far as I've been.

  6. #15
    Senior Member ancientdad's Avatar
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    Okay, so since you don't plan to use the electric start then repairing the clutch is no big deal... but, I'd still consider pulling the rotor to check the tightness of the screws holding the outer housing to the rotor, since if they are loose and get worse after you start riding it you'll have to do something about it anyway or risk more damage to the rotor
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  7. #16
    Junior Member spenzher's Avatar
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    so I just an update, I pulled it off and nothing really seems to be amiss. Scratching my head on this but it seems okay so I just reinstalled it. Piece of Aluminum found in old oil-20190529_120653_1559231467135.jpgPiece of Aluminum found in old oil-20190529_120714_1559231504147.jpgPiece of Aluminum found in old oil-20190529_120218_1559231595066.jpg

  8. #17
    Supporting Member Yendor's Avatar
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    Depending on how much is missing it may cause a balance issue.
    1970 CB 350 CAFE - Current Project on the bench,
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    1st Bike 1970 SL 350 (Brought home in Parts - Trailer/Trunk/Back Seat - I miss that bike),
    2nd - Bike Kawasaki 750
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