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G 15 Stator / alternator fitting

G 15 Stator / alternator fitting

Postby tripower » Sun Aug 24, 2014 4:48 am

I have a 65... G-15 750/850 build going on, with the stator bolted in the primary cover... will the commando stator fit inside the cover with out having clearance issues...


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Re: G 15 Stator / alternator fitting

Postby BillT » Sun Aug 24, 2014 8:42 am

Yeah, standard Lucas or pattern stator and rotor found on most English bikes. No way to tell if the stator clears the rotor, except to start it up and see if smoke pours out of the inspection hole.
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Re: G 15 Stator / alternator fitting

Postby dave M » Thu Sep 04, 2014 3:05 pm

Could you wrap a couple of layers of masking tape around the rotor temporarily fit the cover and then remove it to see if there are any marks present after turning the engine over a few times?

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Re: G 15 Stator / alternator fitting

Postby BillT » Fri Sep 05, 2014 6:49 pm

Yes, you could - and should - do that. Just check the first few times you run it to make sure the rotor doesn't touch anywhere. I lost one stator after almost 3000 miles. Apparently, the rotor and stator would occasionally touch, and eventually galled up enough to fry the stator.
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Re: G 15 Stator / alternator fitting

Postby hrwat1 » Fri Oct 03, 2014 8:14 pm

What about using engineers blue on the stator?

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Re: G 15 Stator / alternator fitting

Postby dave M » Sat Oct 04, 2014 12:50 am

Engineer's blue is only useful for surfaces that are supposed to touch, the stator and rotor are meant to have an air gap between them, if it touches anywhere you are in trouble. Some wraps of masking tape should show if it is touching anywhere and hopefully by how much. Start off with several wraps around the rotor if it touches keep taking one circumference worth of wrap off until it is clear and that is your gap.

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Re: G 15 Stator / alternator fitting

Postby chilly » Mon Oct 06, 2014 1:29 am

Not done it meself but seems a feasable way of doing it ,just nip up the stator nuts/bolts then wrap shim steel of the right thickness around the rotor then try the cover onto that .

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Re: G 15 Stator / alternator fitting

Postby batrider » Mon Oct 06, 2014 11:28 am

On my Matchlesses I wrapped the rotor with shim stock (plastic shirt collar stiffener piece from a new shirt cut to length) and then left the bolts finger tight (able to move with a little bit of force) on the stator. I'd put the cases together and bump everything around a bit so the screw holes were centered in the cover, then remove the cover straight off carefully and tighten up the stator bolts.
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Re: G 15 Stator / alternator fitting

Postby N0rt0nelectr@ » Sun Nov 09, 2014 12:57 pm

dave M wrote:Engineer's blue is only useful for surfaces that are supposed to touch, the stator and rotor are meant to have an air gap between them, if it touches anywhere you are in trouble. Some wraps of masking tape should show if it is touching anywhere and hopefully by how much. Start off with several wraps around the rotor if it touches keep taking one circumference worth of wrap off until it is clear and that is your gap.

In the past I had used car wax the see if and where it was hitting. Didn't work very well. The idea of using electrical tape make a lot of sense. I would use longer cover screws to keep things in line as you draw the cover up.
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