Honda CR500,fuel flowing straight out overflow??

[rumpelstiltskin]

When running the bike there was a drip,drip,drip out of the overflow all the time.I took carb apart,small jet the float presses was free,float height seemed fine etc,jets were clear.But just for the hell of it i swapped the floats for other ones i had.Now as soon as i switch the fuel on at the tank the petrol flows as quick as its hitting the carb,straight out of the overflow?It just pours straight out!Funny thing is too the bike was going like stink,then when i got home up my concrete path i saw the lovely little trail of petrol behind me.I've a feeling im missing something simple?Anyone any ideas?,its a Keihin pj carb.

[humpbackmaniac]

Put the front wheel back down on the ground!



Sorry no help at all.

[AdeTuono]

Is the float free to ....err....float? Not binding on the float pin anywhere? Float valve and seat clean?
Have you got a compressor to blow through all the ports?

[rumpelstiltskin]

The pin isn't binding.I've even blown through the fuel inlet supply hose and lifted the floats slowly at the same time,the needle for the overflow closes off like it should?

[scotia_steve74]

shake the float - any noise and it has had it (possibly corrosion)...

Edited by scotia_steve74 on Wednesday 19th March 17:21

[paul_tim2000]

Never looked at the Honda carb but if its the same as other units it might be the float height.

Check settings for float height, if the tab on the float is bent the level in the bowl will reach the overflow before the valve shuts off.

See what it's at (fill bowl and measure it, usually quoted as so many mm below the top of the bowl or similar) then bend it so it closes sooner, you can always adjust it back.

Too high a float level can mean it runs rich = improved performance.

[rumpelstiltskin]

No fuel in the floats or corrosion.Im going to try and bend the tab on the floats so it will cut off the fuel in the bowl quicker,see if that makes a difference.(Oops,you go there before me!)Still can't believe this bike went like stink all the way home with so much fuel flying out!

Edited by rumpelstiltskin on Wednesday 19th March 17:35