wont start without choke

[Ltndennis]

thank you all for the help, think i now have a clue to what to look out for, i have started with getting a new set of plugs and adding fuel treatment today, will move to next item tomorrow

 

[fnmag]

thank you all for the help, think i now have a clue to what to look out for, i have started with getting a new set of plugs and adding fuel treatment today, will move to next item tomorrow

Let us know how the search goes.

 

[Ltndennis]

Let us know how the search goes.

i will do that

 

[dwalby]

thank you all for the help, think i now have a clue to what to look out for, i have started with getting a new set of plugs and adding fuel treatment today, will move to next item tomorrow

somebody here who has used the fuel treatment successfully can probably give you a better idea of how long it takes to have any effect, but its going to be more than a day, unless you plan on riding a few hundred miles today.

 

[Al st1100]

Loose / disconnected vacuum hose? Letting in too much air after the carburetor would cause a lean condition and make starting harder.

does not explain "wet" plugs on one side, wet means rich

 

[Ltndennis]

somebody here who has used the fuel treatment successfully can probably give you a better idea of how long it takes to have any effect, but its going to be more than a day, unless you plan on riding a few hundred miles today.

yea a got that, i know that cant be just for a day

 

[wjbertrand]

does not explain "wet" plugs on one side, wet means rich

My thinking is a minor leak that affects mixture with the throttles closed, once started the leak would become insignificant and then perhaps there's too much fuel with the choke on or the choke is on too long? I also forgot to ask which side showed the wet plugs. If it's the left bank it could just be because the bike leans that way on the side stand?
The observation of wet plugs and needing the choke more when cold are somewhat contradictory.

 

[Upt' North]

yea a got that, i know that cant be just for a day

It's going to take a couple of tanks, if it helps at all of course. So probably 500miles or so. Also try to put in best available fuel for a while.
Upt'North.

 

[Ltndennis]

It's actu

My thinking is a minor leak that affects mixture with the throttles closed, once started the leak would become insignificant and then perhaps there's too much fuel with the choke on or the choke is on too long? I also forgot to ask which side showed the wet plugs. If it's the left bank it could just be because the bike leans that way on the side stand?
The observation of wet plugs and needing the choke more when cold are somewhat contradictory.

It's actually the right back,

 

[Ltndennis]

My thinking is a minor leak that affects mixture with the throttles closed, once started the leak would become insignificant and then perhaps there's too much fuel with the choke on or the choke is on too long? I also forgot to ask which side showed the wet plugs. If it's the left bank it could just be because the bike leans that way on the side stand?
The observation of wet plugs and needing the choke more when cold are somewhat contradictory.

It starts with the choke on, then that particular plug gets wts regularly, that's whenever the sound isn't coming, you notice you got a wet plug

 

[dwalby]

It's actually the right back,

vacuum fuel shutoff valve is leaking fuel into the cylinder through the vacuum line attached to #3 cylinder. Bypass the shutoff valve, clean and reinstall plug.

 

[wjbertrand]

Yup agree with Doug, based on this additional information.

 

[Ltndennis]

decided to learn a lot from here, so far seem to getting closer with the informations gathered from here, did some physical assessment today and found something similar to the attached picture wich i believe is from the base of the curb ,mine seem worse, doing all with a local mechanic who doesn't seem to know a lot, i had to get info from here to to push to our current state.

vacuum fuel shutoff valve is leaking fuel into the cylinder through the vacuum line attached to #3 cylinder. Bypass the shutoff valve, clean and reinstall plug.

,
will check the valve too for any leakage.
I also found traces of oil at the side circled with red in an example picture shown below

 

[wjbertrand]

Hmmm, OK that looks like left side not where the vacuum fuel valve is connected

 

[Al st1100]

that vacuum goes to the pair valve... I thing that is gas residue, no oil goes thru that