Front Carb overflowing

[OldMan]

G'day all.

I'm getting reday to sync the carbs...

Can you help me work through some of the possible causes of my front carb overflowing out the top breather. I have just clean and jetted the carbs.
Obviously, the float is malfunctioning somehow, but not sure how. Should I bend the metal tab by small increments to ensure the plunger seals the flow of fuel?



Thanks for any help offered. I'm learning the hard way...

[Herb]

Pull the float off and pull the needle and see what it looks like. Check the spring loaded pusher for proper operation. If it doesn't move freely it can be stuck pushed in which would raise the fuel level.

Check the seat and the needle with a magnifying glass for anything worn or pitted, or even a small amount of dirt. This can prevent the valve from sealing completely.

Adjust the float according to specs. Don't try to adjust it to stop the fuel flow, it will end up too low and the cylinder won't run. Voice of experience, I tried that when I was about 14, didn't work worth crap then, won't now.

[OldMan]

Thanks, bloke.

I have used two different needles (had a carb rebuild kit) including all new parts.
I will reset the float with the micrometer and see how that goes tomorrow.
Thanks for the checklist.

[Fred]

Think of it like a toilet water tank,--fils up and stops. But if its over flowing any adjustment wont help because it is leaking passed the needle.

You mean a vernier not a micrometer. You can cut a piece of cardboard out of a corn flake packet with a gap of what ever float level you want. Or a kids compass or anything like that.

Looks nice and clean in there.

[OldMan]

Yes, I sonic cleaned both carbs - perhaps in that process of disassembly and reassembly, I may have messed up the float level.
Ok, problem fixed. Seems to have been the float measurement was out. Got it working nicely at 9.5mm.
Now, to sync the carbs and get rid of the popping with the A/F mixture. Thanks for the assistance and feedback.

[OldMan]

Carbs are synced, but there is a bit of popping.
Just going to chase down the joints on the new exhaust because that seems the most likely suspect, at this stage.

[m2h]

Hi if you are getting some popping but it idles ok but pops when you give it throttle sounds like its too lean. What did you do to the jetting? Did you open up the air filters? if so you've more air than the jetting can handle. Try raising the needles one groove if you have the grooved type or a small washer under the clip if not. That will make a difference some. Playing with jets can be a challange bro. [emoji2] Have fun. I've uncorked my 1400 so i know you will

[Fred]

Hi if you are getting some popping but it idles ok but pops when you give it throttle sounds like its too lean. What did you do to the jetting? Did you open up the air filters? if so you've more air than the jetting can handle. Try raising the needles one groove if you have the grooved type or a small washer under the clip if not. That will make a difference some. Playing with jets can be a challange bro. [emoji2] Have fun. I've uncorked my 1400 so i know you will

Sorry M2h im going to disagree 100%

http://www.mychinamoto.com/forums/showt ... -different

[m2h]

Hi if you are getting some popping but it idles ok but pops when you give it throttle sounds like its too lean. What did you do to the jetting? Did you open up the air filters? if so you've more air than the jetting can handle. Try raising the needles one groove if you have the grooved type or a small washer under the clip if not. That will make a difference some. Playing with jets can be a challange bro. [emoji2] Have fun. I've uncorked my 1400 so i know you will

Sorry M2h im going to disagree 100%

http://www.mychinamoto.com/forums/showt ... -different

Hi Fred hey yeah thats good info and i do understand a bit about the carb and how it works. I was just relating a bit about the journey thru my uncork process. I played with jets til i was sick of pulling the carbs off. In the end the popping dissapeared the minute i raised the needles. Thats why i asked about jets and filters. As you obviously know more air flow needs more fuel and a freeflowing exhaust for the whole thing to work.
Cheers

[OldMan]

Got it all sorted [thanks for your help and encouragement]. It was fiddlier than I imagined and took some messing around to get the right balance.

Took the baffles out and am well pleased with the result.