Pukin fuel

[FRITZ]

I recently had all the recently rebuilt carbs off and cleaned them out nice and good. at the same time i replaced all the seals in the petcocks and lubed everything up. Heres the problem. the bike runs well enough however, while the bike is running the carbs are getting WAY too much fuel and dumping it all into the airbox. I checked all the floats needels and slides while the carbs where off, but to no avail the thing still wants to push way to much fuel through.

My second problem is i have an oil leak somewhere around where the right side collectors are. i dont thinks its too much of a problem to replace the seal, but my main concern is the hot fuel dumping out on my mufflers.

the bike is a 1982 XJ100

Cheers

[trbig]

If you are getting fuel into the air box, your float pins aren't closing/sealing. Sometimes after the carbs are off and worked on, and there's no fuel in the bowls, the floats fall down far enough (when the carbs are tipped upright to install) that it lets a float pin almost come out, then get cocked sideways where it can't slide back up in. This is dangerous since it can be dumping fuel into your oil, breaking it down to where you wash out and ruin bearings.

Check for an oil leak under your right (alternator) cover. It could be leaking from a crank seal under the rotor.. or there is also a galley plug that leaks sometimes. DO NOT try to run the motor with this cover off. It holds this galley plug in. Pressure will shoot it and a half gallon of oil all over the place.


Tod

[prometheus578]

"I'll say it once again..."

Anytime the carbs are offa the bike... prop 'em on your workbench, hook fuel to them and "BENCH TEST' them for leaks before putting them back on the bike.

I checked your previous postings concerning the carbs, Fritz.
Though they were mentioned several times, my apologies for not stressing replacing the float needles and bench testing.

[Guy_b_g]

Make sure you didn't confuse the carb bowl vents with the fuel intake fittings on the carbs.

[FRITZ]

ok so i perfromed the bench tests along with cleaning the carbs out again and even went as far as to remove the jets and blew them out as well. so now that i have esablished its not a float problem. the only other thing i can think of its got to be that fuel distrubuter.

I fount another thread with how to check it and i still get fuel pouring through the hoses when there is no vacume. What can i do to rebuild the distributer. Also just so i am clear. does anyone have a diagram on how to proporly put the hoses together.

Thanks

[Ken Talbot]

For lots more info on this, use the words 'octopus diagram' in the search tool at the top of the page. You'll find some alternate routing, and ways to eliminate the octopus altogether.

[trapper_492001]

Sometimes the floats can fall too far down in the bowls and get wedged there. When you have the carbs off and the bowls off and the carbs right sid up check to see if one or more float is lower than the others. If one is lower there is a tang on the float near the post that can be adjusted.

Trapper

[TopCatGr58]

Hey Fritz,

Here are a couple of photos....you'll need to click on them to see the full size, but it shows the off angle float needle, and the float tang to adjust to prevent it from dropping down so far!





However, the Octy=fuel distributor IS supposed to turn off the fuel flow when the engine isn't running, BUT the carbs float needles ARE supposed to prevent the fuel from overflowing the carbs.....SO....IF your carbs are still puking fuel, THEN the float needles are NOT sealing properly for whatever reason.

But if what you are saying is that fuel is not leaking from the carbs anymore, BUT still leaking from the OCTY, then you have a few options. Rebuilding the Octy, a PITA depending on the parts/kit you get, OR you can remove it and just rely on the petcocks but you have to turn them OFF when parking to stop the fuel flow so that IF your floats/needles don't seal it won't flood them and possibly contaminate the oil with fuel!

BTW, do you have INLINE fuel filters, the ones in the tank on the petcocks can still allow fine particles thru which can wedge between the float needles and seats causing continued leaking!
Some have gotten an extra inline cutoff fuel valve as a second layer of protection between the petcock and carbs without worrying about the OCTY! Your choice!
T.C.

[FRITZ]

Perfect. the fuel problem is all fixed!. thats for all the continued help. and yes, the problem i was haing was a combination of a dirty float needle and the small o-ring for the octopus was in need of a replacement.

Cheers