Mechanical advance governor

[Jhurt]

Bike: 1978 GS750E. Does anyone know the difference between the 2 mechanical advance part numbers listed on the fiche? Mine is rusted hard and both part numbers appear to be available on ebay BUT...I’m not sure which to order. I see what looks like identical units to what I have under both part numbers...

Parts 11-1 and 11-2 here:

https://www.partsoutlaw.com/oemparts/a/suz/50d3ff83f8700230d8b4df82/contact-breaker-nd

ETA. To further confuse me, one part had “ND” as part of the description which i assume means NipponDenso and I have the ND ignition but the other part lists “B,C&EC” in the description and my particular bike is the GS750EC

 

[allojohn]

I don't think you can mix them.... you have Nippon Denso parts while other '78 750's have KD Kokusan Densi. Sorry, that's all I've got.

 

[Steve]

... I have the ND ignition but the other part lists “B,C&EC” in the description and my particular bike is the GS750EC

Sounds like you need to learn some of the alphabet soup related to GSes. :-k
(At least it's not as confusing as all the letters on a Harley. )

Your GS750EC says that it's (approx) 750cc, the "E" says it's the deluxe model with a few extras (cast wheels, triple disk brakes, maybe a few other things), the "C" says it's a 1978 model.

The GS750B would be a 1977 model. I don't think there was an EB.

You still need to be mindful of the ND vs. KD ignition parts, the years won't matter all that much.

.

 

[Jhurt]

Well, i took a chance and bought a NOS governor from ebay, looks clean and when I zoomed into the photos posted I can see the ?ND? logo. Hoping that?s the one...