1977 gs750B jets

[HighCountryGS]

The bike is a 77. no telling what the jets came out off. I know they are Mikuni because of the stamp. I opened up the carbs and half of the the o-rings were missing so they could have been changed, but bike is all stock. That problem has been solved thanks to cycleorings.com.

[chuck hahn]

Well my 77 is all stock as well..I am pulling the carbs off tomorrow to do a bit of clean up and adjusting..Tell you what, i will look at the internals and post whats in mine..fair enough???

[HighCountryGS]

Well my 77 is all stock as well..I am pulling the carbs off tomorrow to do a bit of clean up and adjusting..Tell you what, i will look at the internals and post whats in mine..fair enough???

If you would i would appreciate it.

[HighCountryGS]

High Country..I just opened the carbs up and the MAINS are 110 and the PILOT JETS are 17.5 ,,,Clip in the middle groove

So did they put all different sizes of jets in from the factory? or did you put those 110's in?

I'm not trying to seem stupid, but everywhere i look it seems like there are dIfferent jets in these bikes. Some 100,105, i have 107.5 and you have 110. Then i have seen some 15 pilots and we both have 17.5 pilots. My head hurts...

[rustybronco]

Hope this helps...

http://thegsresources.com/_forum/showpost.php?p=324909&postcount=43

[tkent02]

Stock mains are either 100 or 102.5 depending on the year, pilots are 15.
If you run bigger jets for no reason it will run like crap.

[chuck hahn]

According to the charts and whats in mine i would say mine are incorrectly jetted as well

[GS750]

My '77 GS750B originally had the 102.5 main and 15 pilot jets I know because when I bought the bike they were in a bag in the tray under the seat lol

[GS750]

I also think it depended on location (country?) because there are other things to consider such as emissions requirements, laws, altitude etc.

[HighCountryGS]

I also think it depended on location (country?) because there are other things to consider such as emissions requirements, laws, altitude etc.

I figured as much.

[chuck hahn]

Highway..heres where i wound up with my same problems. I got the 100 mains jets and the 15 pilot jets today. Man what a difference. Look at the thread Carb mechanic wanted that i started. I was 100 % sure imwould never be able to get them done myself. The final steup as i have them right now are there..Be advised your bike is its own animal but i think the final settings will be of value to you..Hope it ends well for you too. Beusre to run a wir thru all the little holes in the emullsion tube s too.mine had a bit or crud in them.

[HighCountryGS]

Highway..heres where i wound up with my same problems. I got the 100 mains jets and the 15 pilot jets today. Man what a difference. Look at the thread Carb mechanic wanted that i started. I was 100 % sure imwould never be able to get them done myself. The final steup as i have them right now are there..Be advised your bike is its own animal but i think the final settings will be of value to you..Hope it ends well for you too. Beusre to run a wir thru all the little holes in the emullsion tube s too.mine had a bit or crud in them.

Hey thanks. I have been following your thread to see what you ended up with. Where did you get your jets from? Z1?

[chuck hahn]

Yes Z1..they are a greaqt place and they get stuff out and in your hands FAST.. 3 days in my case. and in the bike tonight . It took a lot of knocking buy the guys to get it all through my thick stubborn German skull ..

[HighCountryGS]

Yes Z1..they are a greaqt place and they get stuff out and in your hands FAST.. 3 days in my case. and in the bike tonight . It took a lot of knocking buy the guys to get it all through my thick stubborn German skull ..

Do you happen to have the parts numbers or link? I was browsing their website last night and i saw the pilots but did'nt see the mains.

[chuck hahn]

Mikuni LG round main jets # 100 Part number KL18-372-1.. 7.00 FOR 4 JETS
#15 Pilot jet Part number TU42-6170-1..10.84 FOR 4 JETS
TOTAL OF THE ORDER...24.84 INCLUDES SHIPPING