Topic: Carb No1 Spitting fuel

[Steelo]

Can anyone advise me whats going wrong here? CB 750 K7 carb number 1 started spitting fuel from intake side of carb the bike lost power and I had to limp home at about 10km/h with a Honda Rebel 250 rider pissing himself laughing all the way following me.

It started about 20km after refueling. I have a new fuel filter inline.

Do I need to drop the bowl and check inside?

[dusterdude]

i would drop the float and needle and spray some carb cleaner and maybe clean the needle seat with a soft rag or brush

[Joe Danger]

Happened to the number 4 carb on my 550K.  Turns out I hadn't tightened the needle jet and main jet in all the way, they fell down into the bowl and acted like a siphon for raw fuel.

[Glenn Stauffer]

Always drop the bowls first because it is easy and quick to do.  Same thing happened to me as Joe describes.  I dropped the carb bowls parked on the roadside and fixed it right up in a few minutes.  I've had floats stick, but that condition never caused such bad running just leaked fuel when parked.  A quick tap on the side of the carb bowl frees those up most times.

[MetalHead550]

It probably is the float/needle+seat, but losing spark to #1 would have the same effect right?  No spark to burn the fuel so it overflows?  Does it overflow when the petcocks on and its not running?  Either way you may want to pull plug 1 and have a look.  Also check youre oil to see if its been diluted with gas at all to be on the safe side.  Just trying to cover all areas.

[Steelo]

An "expert" (don't they always appear?) thinks it could be a dropped valve. Is this a possibility? I'll run the compression tester over it anyway!

[eldar]

I would seriously have to doubt a valve issue. It is likely a carb problem. Maybe a dropped jet but it could just as likely be the float is sticking badly.

[Gordon]

I would seriously have to doubt a valve issue. It is likely a carb problem. Maybe a dropped jet but it could just as likely be the float is sticking badly.

Have to agree, here.  Start simple and work your way up to the "worst case scenario" options.  Not the other way around.

[Steelo]

No compression - looks like the "expert" tyre kicker was right. LOL there was a bit of a rattle just as the bike started to die.

Oh well looks like a top end job 

[750goes]

That sux,

If you maybe need some parts, let me know, located in Sydney--- we have a few wreckers, also one local to me that has a few bits, might be able to help out..