Rusty CT70 Stator - How to Clean - Can it be Saved?

Discussion in 'Tech Area' started by Bidnadir, Jul 31, 2020.

  1. Bidnadir

    Bidnadir New Member

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    Hi Guys, we've got a 1972 CT70 that has no spark. Even using the flywheel puller it really didn't want to come off. After finally getting it apart it was clear why the flywheel was so hard to get off as it's rusty as heck. We'll be putting new points and condenser on it, but wondering how best to clean up the stator windings? Should we give 'er a try or just buy a rebuild kit. If the former, what's the best approach to clean the windings? Your guidance and wisdom are greatly appreciated.
     

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  3. cjpayne

    cjpayne Well-Known Member

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    Soak it with WD40. Sand down the metal contact points to the flywheel. WD40 again, then use electrical contact cleaner. WD40 again. The flywheel probably needs the same. Definitely replace the points. The condensor may still be good. Go ahead and replace the stator plate screws with allens. Your going to need in there anyways. You can find replacement ones at Ace Hardware.
     
  4. Bidnadir

    Bidnadir New Member

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    CJPayne, thanks very much for the advice! We'll give that process a try and see what happens.

    For testing the stator coils to see if they are still good the service manual I have only provides the ohm resistance value for the AC coil of 1.3 ohms (page 48 of the service manual downloaded from this site). Wondering what the ohm value for the stator ignition coil should be as that info is not listed?
     
  5. cjpayne

    cjpayne Well-Known Member

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    1-2 ohms. I dont trust that, so just see what she does. Clean everything thoroughly. Emery cloth on the flywheel with wd40
     
  6. Bidnadir

    Bidnadir New Member

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    Thanks very much for the advice...really appreciate it! We'll give it a shot and see what she does.
     
  7. Beretta

    Beretta Member

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    Mine wasn't quite that bad --I chucked up the Flywheel in a lathe and sanded it smooth-amazes me that people leave these Bikes out in all Kinds of weather and just forget about them .
     
  8. allenp42

    allenp42 Well-Known Member

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    Late to the party. Your stator should clean up nicely. If you have a dremel tool and few brushes of different sizes, you can clean up the coils pretty well w/o removing them from the stator plate. Just be careful and don't let any of the bristles get near the windings. Then as CJ mentioned, a little WD40 here and there, new points and you should be good to go.

    A dremel tool also works well on the flywheel, but a lot of times I use a emory cloth and drivel tool if I want to get it sneaky clean (which is not required).
     

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