Stator replacement

[81suzy]

Are the stators from GS 550 and GS 650 interchangeable?

[Rich82GS750TZ]

You will have to look at specific years and models and cross reference the parts fiches on a site like partshark.com. Look a the Generator page. On some years they call it a STARTOR, we know that ain't right. Anyway, a brief look shows that some 80s models of 550 and 650 shared the same 18-pole stator (I'm sure lots of other years/models/displacements as well), Some earlier 550 models had a 12-pole stator. You've gotta do a bit of picking around.

Oh, and welcome to the forum.
We like pictures, and signatures with your bike(s) years/models, too.

[81suzy]

Thanks for the info. Got a new one off eBay but the gasket isn’t the same as mine is. I’m assuming they sent me one for a 550. Gotta do some testing. The repair manual says it should produce 80volts AC between the terminals from the stator at 4000 rpm. I have a voltmeter on the bike. Took it for a 85 mile ride Sunday. It will maintain 13.2 volts DC while cruising at 4000-5000 rpm. But drops to 12.7 at around 2500. Im hesitant to break the engine case unless I know for sure it’s the stator.

[Nessism]

13.2 volts is poor performance. Did you remove the stator loop and clean up the wiring to eliminate resistance?

[81suzy]

I have not. The only thing I’ve done so far is to clean the regulator/rectifier ground wire connection to the motorcycle frame. Baby steps.

[81suzy]

Next step is to take the AC voltage measurements between the stator leads.

[Nessism]

I'd skip straight to this. Even if you are using a shunt R/R, it should be wired like this...

SH775 Install by nessism, on Flickr