1982 gs750 motor issues

[Guest]

well this is my first inline4 bike. so I had carb leaking issues that has been resolved temporally but tapping on the carbs. but it doesn't sound like its firing on all 4 revs to about 6500ish and breaks up. the is a breather type hole in the top of the head/intake where hot steam/air comes out of???? is there supposed to be a breather plug of some sort in there???


any and all info will be appreciated
-armenian

[OriginalOwner]

It's a breather hose that should connect the top of the valve cover to the air box. If it's the same as my 81 GS750, it's 11mm, which is just a touch less than 7/16.

Other than that, a carb rebuild is in you immediate future. I recently had similar symptoms (one cylinder not firing) and it was because of a sticking float needle.

Feel which pipe is cold and take off the bowl screw to see if it's getting gas. Check the spark etc. -- go thru the usual flow to see what the problem is.

Here's the hose routing:

http://members.dslextreme.com/users/storagecliff/images/hose_locations.html

And here's the carb rebuild tutorials:

http://www.mtsac.edu/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf

and

http://www.mtsac.edu/~cliff/storage/gs/mc_maint/GS_CV_Carb_Cleaning_Series.pdf

Lots of good stuff here, welcome to the site!

[thearmeniansmr]

no airbox going with pods. what should I do with that breather hole on the motor and I pulled the plugs and 1 and 3 were black and 2 and 4 were white. it has a café race exhaust what jetting should I go with

[tkent02]

Hard to tune it from here. You will need to do it yourself.

It will be easier if you do all of the other neglected engine mintenance first.

[Nessism]

well this is my first inline4 bike. so I had carb leaking issues that has been resolved temporally but tapping on the carbs. but it doesn't sound like its firing on all 4 revs to about 6500ish and breaks up. the is a breather type hole in the top of the head/intake where hot steam/air comes out of???? is there supposed to be a breather plug of some sort in there???


any and all info will be appreciated
-armenian

Check this...http://www.thegsresources.com/_forum...d.php?t=171846

[thearmeniansmr]

so it is confirmed the white plugs the pipes we way cooler than the other pipes. any idea on jetting on this bike pods and 4to1 pipe with race can. stock otherwise and stock carb's bs32ss. and any tips on tuning a cv carb with individual pods as they usually run best with a airbox of sorts. however that is not an option. because the mounts are deleted and the box is incognito. any body know a great wheelie highway sprocket combo it seems very rev happy like tops out rather quickly. on two cylinders it goes 55 at 5500 rpm and it tops at 11000 rpm seems like ill only get 80ish out of it. any and all help wil be greatly appreciated


-Armenian

[blowerbike]

st.3 jet kit and good filters is the only cure unless you go back to an air box.
let me guess....you have the chrome cone air filters?