'77 gs750 jetted for pods vm26 fuel screw

[garyS-NJ]

have the carbs off my '77 gs750 bc it mysteriously stopped firing on #2&3. Yes of course I went through those coil connections and verified spark.. anyway,with pods and stock exhaust with muffs chopped in half, about where should the fuel screw be set? It was at 1.5 turns out and it was running well but one was a tad off then I was thinking of going richer. Everything I could find said factory setting was between 1/2 & one turn out snd one guy said start out setting the air screw on the side double what you set the bottom fuel screw. Oddly enough my air screws were set at 1.25 turns out. And yes it was running pretty smooth (docile but smooth, I see my points are around 0.014" vs the spec 0.018"). I bought this bike along with a gs1000 and only tried to get the 750 running smooth which it did, for sale with some facelift. Just set points to 0.018" and static timed. Fuel screws set to 1.25 turns out and it doesn't want to idle. Not firing on 1&4 but coils, points, condensers, and wiring checks out ok

[tom203]

I take it by “not firing” you mean that you got known spark, but cylinder ain’t getting hot.
Have you replace the head boot o-rings ? Maybe the boots themselves?

[Rijko]

Sounds electrical/ignition to me if the problem started on 2&3 and is now on 1&4

[garyS-NJ]

Whoops sorry for way late reply.. yes it was looking like a coil or point set but made no sense jumping for 1-4 to 2-3 & I went through to swapping points snd condensers but think my final fix was connectors sinking current to the points

[Rijko]

Good you fixed it