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number 2 cylinder doesn't fire

  • Thread starter Thread starter Anonymous
  • Start date Start date
A

Anonymous

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HAVING A PROBLEM WITH MY 80 GS1100L AGAIN.

I JUST ADJUSTED THE VALVES AND THE BIKE SEEMED TO RUN FINE EXCEPT........... THERE'S ALWAYS AN EXCEPT.

IT SEEMS TO NOT FIRE ON THE NUMBER TWO CYL. ONLY WHEN THE ENGINE IS COLD. SPARK IS GETTING TO THE PLUG AND I CAN'T DETECT A LEAK IN THE PLUG WIRE ANYWHERE.

THE ONLY THING I CAN FIGURE IS THAT I HAVE THOSE VALVES TOO LOOSE.

DOES THAT MAKE SENSE TO ANYONE ELSE?

THANKS,
FRED
80 GS1100L

PS THIS BIKE IS FOR SALE IF ANYONES INTERESTED
 
when the engine is cold...as in...you're using the choke...or cold, just warmed up a few minutes, no choke?

for some reason, soon to be determined, the carbs i'm using only fire 3 cylinders when i'm on full choke. the bike starts and warms up fine this way, i just give it gas and back off the choke and the 4th cylinders starts firing in a few seconds...
 
Sounds to me like the choke circuit on that cylinder is clogged. You pick up a cylinder when the throttle is advanced because the carbs transition to the fuel pilot jets and air screws and drop out of choke mode. (yes, even though you are still holding the choke lever when twisting the throttle) :-)

Earl


AOD said:
when the engine is cold...as in...you're using the choke...or cold, just warmed up a few minutes, no choke?

for some reason, soon to be determined, the carbs i'm using only fire 3 cylinders when i'm on full choke. the bike starts and warms up fine this way, i just give it gas and back off the choke and the 4th cylinders starts firing in a few seconds...
Click to expand...
 
Re: number 2 cylinder doesn't fire

Your choke circuit is either clogged, has an air leak around the seals or the pickup tube is blocked. If this is the case, it follows then that your internal passageway for the fuel pilot jet is also blocked.

Earl


mbfmgp said:
HAVING A PROBLEM WITH MY 80 GS1100L AGAIN.

I JUST ADJUSTED THE VALVES AND THE BIKE SEEMED TO RUN FINE EXCEPT........... THERE'S ALWAYS AN EXCEPT.

IT SEEMS TO NOT FIRE ON THE NUMBER TWO CYL. ONLY WHEN THE ENGINE IS COLD. SPARK IS GETTING TO THE PLUG AND I CAN'T DETECT A LEAK IN THE PLUG WIRE ANYWHERE.

THE ONLY THING I CAN FIGURE IS THAT I HAVE THOSE VALVES TOO LOOSE.

DOES THAT MAKE SENSE TO ANYONE ELSE?

THANKS,
FRED
80 GS1100L

PS THIS BIKE IS FOR SALE IF ANYONES INTERESTED
Click to expand...
 
interesting enough Earl, i've had that set of carbs apart two times. i will investigate when i swap the carbs back to its original engine next week. if anything, it still works.

~Adam
 
MY PROBLEM OCCURS EVEN WITH THE CHOKE OFF AND A COLD ENGINE.

# 3 FIRES AFTER ABOUT 5 MINUTES RUN TIME IF I RIDE IT.
 
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