Naughty GS

[baz]

Can anyone help,got a 79 gs 1000 will only run on three pots ive had the carbs off and blew them out with compressed air,checked the jets and everything seems fine but still a luke warm downpipe? any suggestions would be greatly appreciated. P.S it does have spark.

[Bustedknuckles]

it could be a number of things... most likely a carb issue though. did you fully tear down, dip, and rebuild the carbs? if not, i would do that before you try anything else. the jets could look fine but there are many TINY passages inside of a carb body and there could be buildup or a clog somewhere.

also, what does the spark plug look like? is it wet with gas?

[Big T]

Is it the #3 carb?

Bad petcock

Did this ever run well before?

Not enough carb cleaning

[chuck hahn]

+10 Buste3d knuckles..half measures avail us nothing as the saying goes...except the chance to redo it.

[baz]

Hi ,i didnt do a full strip and dip ,i guess thats the next step and as for the plug it looks as if the motor is running rich, And yes it is #3 why do you ask?

[baz]

I got this bike in boxes so i dont know how it ran before .Also i didnt get the original gas tank with it so im using a cx500 tank could this have anything to do with the fuel delivery??????????????

[Steve]

And yes it is #3 why do you ask?

He answered it for you when he asked you the question.

Is it the #3 carb?

Bad petcock

Especially since you are running rich on that cylinder. The most-likely cause is a hole in the petcock diaphragm.

You can take your chance with a petcock rebuild kit, but the success rate is around 15-20% on those.

Most will spare themselves the aggravation and double expense, and just go straight to a new petcock.

.

[Katarat]

Im more inclined to think you need to remove the pilot jet # 3 carb , clean it out with guitar string that fits, clean the passage it goes into and clean the air hole & jet if there is one in the airbox side of the carb to the airjet. I had a blocked internal passage on my GS1100 that drone me nuts, I had the carbs off & on 6 times. I finally sawed a spaer one in half to find out the air hole was a blind passage and had to be cleaned from both ends. With no air getting there no fuel could flow. But this is just my opinion, others may vary