1977 GS 750B jetting

[Beau57]

I realize there are a multitude of posts concerning jetting and hoped someone has my same set-up and I can gain some insight from them.
Basically a 1977 GS 750B with 4-1 Kerker (aftermarket fiberglass wrap inside) and cone filters. As a good starting point what size jets have others experienced? What is the best source for jets? Thanks in advance to all.

[jabberjoe87]

heeeeeey i have a 77 gs750b!!! these bikes have the slide throttle whatever carbs that do benefit from pods. I have a 4-1 v and h. My original main jet was a 100. and the pilot was a i think 17.5. This is assuming you have the vm26 carb, which you probably do. I put the float needle up a clip to lower the needle, and put a 110 main jet. The peice of paper that came with my pipes said put in a 115 main and i can't remember exactly but i think it was a 20. Anyway the bike ran really really rich so i took out the packing and cut off the muffler so it only has a section of the muffler and the tip for noise and some back pressure now it doesnt seem to be running too rich or too lean, i might re-assess this when its warmer out to see if bigger jets will help, but lean is mean... sorta. Hope this helped

[jabberjoe87]

A source for jets is just about any bike shop, the mikuni jets are very common

[Ludeykrus]

The 77 750b is the same, motorwise, as my 78 750, right?

Question if so:

Let's say you had stock mufflers but with the baffles gutted out and you tossed on UNI pods; what's an idea of a good overall jetting setup to start with? I've seen thread talking about 750's with a pipe and pods, but I wasn't sure how much a gutted stocker pipe would change that equation...

[jabberjoe87]

probably still a 110 or 115 main, i beleive the 77-79 gs750b are all the same