1977 gs750B jets

[TheCafeKid]

Better still lemme seen the bowls. Can you access the main jet through the drain plug?

[HighCountryGS]

Better still lemme seen the bowls. Can you access the main jet through the drain plug?

I don't believe that you can. the drain plug is at such an angle that you could't access it.

[chuck hahn]

Just a few post up he said they measured 26 MM. He called ma last night and i told him where to measure them..I am confident he got it right. Maybe a pic of them all put back together and on the rack would be helpful. The jets and bottom screw are still in the open so mounting wouldnt hurt anything at this point.

[HighCountryGS]

Just a few post up he said they measured 26 MM. He called ma last night and i told him where to measure them..I am confident he got it right. Maybe a pic of them all put back together and on the rack would be helpful. The jets and bottom screw are still in the open so mounting wouldnt hurt anything at this point.

Yeah i was thinking that. I will probably get on that tomorrow after work.

[chuck hahn]

Yes..at least the mounting will be out of the way so when you get an answer you can just carry on from there..if the news is good then fine. Then you know whats up ..

[rustybronco]

The round hole on the lower left side of the picture would have to an air jet installed in it.

do you see a brass orifice in the small round hole that may or may not have a screw driver slot in it?

[HighCountryGS]

There seems to be a small hole in there, but i dont think its a brass jet. Both of the lower holes look the same.

[rustybronco]

There seems to be a small hole in there, but i dont think its a brass jet.

Depending on the size of the hole, it should work. all the air screw does is make an effective 'variable' orifice. are there any identifying stampings around the flange where the float bowl meets the body. I didn't see any in your pictures. if there are any marks, it would help to find out what they are off of.

I didn't read the complete thread. what size are the pilot jets in those carbs?\

***edit***
how about one more picture of the two lower ports showing the orifice/hole?

[chuck hahn]

Did you double check the throat diameter Andrew? What gets me is where do you adjust ( tune ) the air to fuel mixture....

[chuck hahn]

Dael..To sum it up shortly..He ws having the same basic problems i was having and was kinda mirroring my thread and getting his 77 up to snuff. Then he posted about where is the air screws. I told him to call and we talked for a bit. I told himm where to measure to be sure they were 26mm. Then he posted pics for me to see and i was stumped cuz that doesnt look like the 26s we are all used to dealing with.. I was wondering if they are real early model 26s and the ones we have ..having the SS added after the VM 26 ( vm26 "SS" ) is why they are different..

[HighCountryGS]

The jets that were in there when i opened them up were 107.5 mains and 17.5 pilots. The jets have the Mikuni stamp on them.

Chuck...I did measure those again. and i got 26 on the engine side and 40? on the intake side.

[rustybronco]

I'll go out on a limb and say you have a mid 70's set of Kawasaki carbs. possibly from the KZ750~900 models?

I'd call/pm jeff at Z1 and ask Him.

[chuck hahn]

KZ model were two strokers..not 4 stroke

[rustybronco]

KH is a 2 stroke.

[chuck hahn]

Yeah youre right.. thats what a guy had when we were kids. 2 stroke 500. I remember that sound. that was probably 35 years ago. And as i remeber the bike was pretty fast too..at least i thought it was.