carb troubles again

okay so i am really confused
i dont get much time to spend fixin this thing so i i try every other weekend
but i really need help?
i rebuilt the carbs and i put them on thebike and gas comes out of the air intake
i need to fix float adjsutment right? need to adjust the floats ( and yes they are zestfully clean with new needles0 so adjust and replace on the bike turn the gas on and start them up
runs good for 2 min then gas leaks from the inside carbs and in a few seconds all of them are leaking out the back
so i remove check for float adjustment on the bench
replace, turn on and start bike untill gas leaks AGAIN!
arghh
but...
when i turn the petcok to the "off" post it seems to work better?
no leaks and i left the bike running 5 minutes and it diddnt run out of gas and diddnt leak?
so what gives? petcock? is there some vacumn line that i am missing?
when i am doing all this i dont have the airbox on ( itmakes it quicker to work on
so do i need to get fuel reg? petcock? ??
or just ride it like it is?
gas leaks from the carbs when petcock is in the on post
no gas leaks when its on the off post
any thoughts?
actualy now that i think about it if i have the gas tank off and i turn the petcock to "on" gas comes out
i need to test the petcock?

 

With the Petcock Lever pointing straight down ... the Petcock should NOT allow a drop of Fuel to leave the tank unless there is Vacuum present at the Vacuum Line.

If your Petcock is leaking-by ... you have to take corrective measures or you'll flood-out.
Corrective measures are:

Rebuild and overhaul.
Replace with new Petcock.

There are too many rebuild kits that do not solve the issue.
I tried to rebuild a Members Petcock and the Kit leaked-by worse than it did before the Kit went in.

It is my own personal opinion that the best thing to do ... cost wise, time wise, and for peace of mind ... is:
Buy a Brand New Petcock.

The one you had operated flawlessly for almost 30-Years.
That seems to be a pretty-darn-good track record of reliability.
I can't say that about the rebuild Kit that didn't work from day one!

 

well
overnight it didnt leak
so i assume that the petcock is in the off position?
or that the floats worked to stop fuel
i will be getting out there soon enough to test the petcock

 

If the carbs are overflowing while running (petcock "ON") the problem is at the floats.

They'll idle a long time on just what's in the bowls with the petcock "off".

 

what possible problems?
needle float?
hang ups?
how do i check/fix

 

i agree with micarl, if you're flooding the carbs just sitting there you have a leaking petcock AND a float issue. either way, you know you have a float issue, so get working on that. while you have the carbs off the bike, i'd check the petcock. turn it to each position and see how it reacts. is it the stock petcock or an aftermarket one? if it is stock, there is no "off" position. you'll have "on" "pri" and "res". while in the "on" position with the bike not running (no vacuum) no fuel should come out. while in the "pri" position, you should have fuel come out. i could be wrong on the "res" position but i think it'll act just like the "on" position except it allows fuel to flow from a lower point in the tank. If you find that you DO have the stock petcock, and all of these check out, try sucking on the vacuum line going to the petcock while in the "on" position. fuel should flow then. If all that checks out, you may have had the petcock on the "pri" position when this happened.

A side note about petcock rebuild kits, I bought one from chacal and have had no problem with it at all. works perfectly.

 

Re: carb troubles again fixed yeah!!!

yeah
succsess
i took em apart 2 times and replaced them
and had breakfast
i was reading a post from the seca owner up north that said" float, needle valve gas was getting by them"
and i could swear that i have them cleaned and new needle valves
except
the damn rubber on the OUTSIDE
so i pulled them looked at them and sure enough it was def not making a seal
so i used some fuel rail o rings and tore off teh old crappy brittle ones and replaced it with the new o-rings and replaced on bike ( takes less then 10 minutes now) and
voila! it worked
no leaks no mess keeps on going
now i have to tune becasue its still hessitates and stalls after 5k rpm
but at least gas does not come gushing out of the back of teh carbs
yeah!!
its such a great day here in sunnyland and i live by the turnbike and i can hear the bikes screaming by.......
cant wait

 

this was the advice that i needed
i read it in a thread taht was way back

There are o-ring seals between the jets and the carb body. If they leak, you will have gas flooding, no matter if the float valves are working or not.

these things arent that easy are they?

 

i haven't done mine (but i have rebuilt and re-jetted my carbs) but it doesn't look real hard to do. the key is to have patience and great organizational skills. there are a lot of small parts to keep track of. if you do this, take plenty of pictures along the way to help you when you put them back together.