Spitting fuel

[amaechizzle]

Story goes,

Bike, wouldn't start in the mornings... Full choke, no throttle. Consequently, the battery died from me bump starting it, but the draining it again every morning while cranking.

So I decided to pull the carbies out, while I replaced the battery, to check everything, do valve clearance's, replace the plugs, and check my float heights.

Everything was stock, so I decided to put 112's all round, new pilot jets, softer diaphragm springs, the earth kit all supplied from RO. Very nice bit of kit I might add.
Also my idle screw's at 2 turns and I put new plugs in.

Put the bike back together over a very extended period of time and finally got to starting it, only for it to rev it's head off! Full choke, no throttle, it started like a dream... only to sit and idle at 4000 rpm with the choke back in, and the idle adjuster completely out!

I thought there was an air leak, I sprayed it with brake cleaner while it was running, and no change in revs

I pulled the spark plugs out, cranked it over and cylinder no.3 *right hand side close to the rider* is spitting fuel (and a shit load of it) well past a meter!!!

Any ideas?
Any help would be well appreciated!!

Pulled the spark plugs out

[Neosophist]

carb 3 leaking fuel into the cylinder? sticking float could do this, fuel would overflow?

If you put the carbs onto a bench and attach a plastic bottle to the fuel in pip and fill with fuel what happens? do they leak?

[amaechizzle]

I pulled the carbies off again, pulled the float chambers off, turned it upside down, and blew into it to see if they were shutting ok.
Couldn't blow through for the life of me... so the valve's are sealing, me thinks.

Refitted the float chambers, and filled with petrol, and not a drop is coming out!

Checked the air filter, and it's clean as a whistle!
The choke linkage is working fine, I can see the cable moving sweet, and working the linkages.

[Neosophist]

Probably had a stuck float valve then.. sometimes they stick and it causes fuel to overflow

[amaechizzle]

Thanks so much for the help mate.

Fitted the carbies back on, hooked up the bottle/tank and she's all sweet!

Pulled the spark plugs out, and cranked it over, nothing coming out.

I got her running, and now I'm over the moon!!