Carb rebuild only 2 cylinders fire

[Jimmbuzz]

I have a previously running 1982 gs750t that had a gas leak from the fuel connectors between carbs 1 & 2 and 3 & 4. I ordered the cycle O-rings kit and disassembled, dipped, and reassembled each carb and I have no leaks! Problem is cylinders 3 & 4 don't fire with or without choke. I loosened the drain plugs of their bowls and they both had gas. I checked the spark plugs, and they were bone dry. Any tips where to look/diagnose? I was planning on taking 3 & 4 apart and checking the idle circuits.

 

[salty_monk]

It's still blocked somewhere it seems... Did you follow the "how to" and pull out the emulsion tubes and everything?

 

[Steve]

You "disassembled, dipped, and reassembled" the carbs. :-k

How fully did you disassemble?
How long did you "dip"?
What are your settings for the pilot screws?

.

 

[allojohn]

I once managed to put the floats on upside down and got the same result....

 

[Jimmbuzz]

You "disassembled, dipped, and reassembled" the carbs. :-k

How fully did you disassemble?
How long did you "dip"?
What are your settings for the pilot screws?

.

1) Full disassembly following the guide: http://gsarchive.bwringer.com/mtsac/~cliff/storage/gs/Mikuni_BS-CV_Carburetor_Rebuild_Tutorial.pdf
2) Dipped each body/bits for an hour as it was running fine before and they haven't seen ethanol gas
3) 2.5 turns out

 

[Jimmbuzz]

It's still blocked somewhere it seems... Did you follow the "how to" and pull out the emulsion tubes and everything?

Yep I followed the CV Rebuild guides on Bike Cliff's site.

 

[cowboyup3371]

An hour is likely not enough with today’s chemicals. Should be at least six but I have left mine in over night

 

[Jimmbuzz]

An hour is likely not enough with today?s chemicals. Should be at least six but I have left mine in over night

Well turns out you were right. Removed all the delicate bits again and dipped over night and it did the trick :dancing: