Cg incorrect float height?

[von1papen]

So I have another carb problem, shes had all the jets replaced, inline filter and everythings been going grand!

However as of the last week she has been running rich and has now finally died, she will sometimes start on choke but once returned to normal she'll die.

The main problem is that fuel is not getting into the carb, it'll run freely through the line when disconnected but not when connected. If I open the drain valve on the bottom of the carb little to nothing comes through.

I'am reckoning the float pin is sticking and not letting fuel through, and so when she starts and idles for afew seconds its merely using the dribble of fuel that intially got into the carb bowl and then dying because no more fuel is coming through!

However, how on earth do you fix a faulty float? Can't seem to find a new one on ebay or weemoto either, will have a look at david silver spares

[Dr. Quack]

Yeah I have had similar problems of late only mine was opposite to your problem, my needle valve was sticking allowing the float chamber to flood.
If I was you I would strip the carb, take out the needle valve, blow out the passage from the petrol intake through to where the needle valve seats and use wire wool to lightly sand the needle valve edges smooth, lightly wire the needle valve seat too, set float height, set mixture screw and away you go.

I don’t know what year your bike is so I can’t give you the stock settings for your carb, you should be able to download the PDF service manual from below which will tell you what they are.
EG. mixture screw turns from it's closed seated position, float height which is measured when the carb is held upside down.

Service manual
https://www.mediafire.com/?8ddilnzt9e1v8

[von1papen]

Got the Haynes manual so it I'am ok there! I just manually filled the carb bowl and she did start bringing through petrol, then screwed the carb together, then put her back into the bike.

(with the bowl full she should have enough to run for a good ten mins on idle so if not getting the fuel through was the problem this should have proved it)

Then she would kickstart on choke, then I'd switch to normal and rev her like hell to keep her running. Upon returning to idle you would hear a sucking noise and a slight rattle and she'd die.

In general there is a sucking noise coming from around the whole carb area maybe even the engine? Even when revving but especially more so when she returns to idle and dies.

So basically I don't think it is the float valve anymore.... Bugger!

[N cee thirty]

lol the cg carb is very simple


take all the jets out and clean um,leave float height as if it ran ok before it will run again good

the sucking noise is probably the carb to airbox pipe not connected properly and leaking

give the air filter a clean aswell
____________________
'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once