CARB PROBLEM

[d.stacey]

Can anyone shed a light on this problem
The left hand carb on my KZ100 A1 keeps flooding (float sticking) and pouring fuel down the overflow pipe (Exspenive)
In 2012 i had all 4 carbs fitted with new kits as more than 1 was discharging fuel,and that seemed to have solved the problem until now
Ihave put fuel stabiler and system cleaner in the the tank,but as soon as i open up the throttle out it comes,The bike has not had a run due to the winter months , I cannot recall this problem from when i had ZS back in the 70s or if there was how it was sorted out,before i put her to bed i drained off the foat bowl and gave the carb a tap
I am limited on carb knowledge
Many thanks

PS Happy new year to all

[Mark Tiller]

sounds like some muck has washed into the carb from the tank...it only takes a spec to hold the valve open

[d.stacey]

Whats the best way of sorting it out

[z1bman]

shake the tank + pour the contents of the tank into a clean container by removing the petrol tap + if there are any rust particles repeat this process until the fuel comes out clean. make sure the fuel tap filter is in place + not damaged you can also put some small in line filters into the fuel lines . you could also use some of this to seal the tank when you know it is perfectly clean inside.

http://www.holden.co.uk/displayProduct. ... de=094.967

[Pigford]

Some carbs have a BRASS overflow pipe within the float bowl - these have been known to split and cause leaking out the end of the pipe

[paulstrees]

Check what Mark says,take the bowl off seal one end of the overflow tube with your fingure and blow on the other to see if it is leaking.
Has the bike been on its side stand while drained?
What ever you do don,t seal the tank with sealant it will cause greater problems later on :shock:

[dave cullen]

agree with mark and paul, sometimes the unpleasant task of blowing up the overflow pipe can cure it(!) but its usually sediment from tank, better to try washing it out thoroughly first; if its badly corroded, doesn't steve cooper who writes in classic mechanics do a chemical restoration of the inside??

[kev edwards]

When i rebuilt my carbs a few years ago i found i had this quite a lot i was also using an inline filter, but for mine it was the needle valves snagging before they seated and i used Keyster kits, i solved the problem by rubbing the three ribs on each needle valve with a piece of 1200 grade wet and dry a few times, from there on in no problems whatsoever, but hopefully an inline filter will cure yours.

[andyb1962]

When i rebuilt my carbs a few years ago i found i had this quite a lot i was also using an inline filter, but for mine it was the needle valves snagging before they seated and i used Keyster kits, i solved the problem by rubbing the three ribs on each needle valve with a piece of 1200 grade wet and dry a few times, from there on in no problems whatsoever, but hopefully an inline filter will cure yours.

and its still no problem kev. just been out to keep her juices flowing and fired up on the button first time. Shes been stood since well before christmas. happy daze!

[kev edwards]

When i rebuilt my carbs a few years ago i found i had this quite a lot i was also using an inline filter, but for mine it was the needle valves snagging before they seated and i used Keyster kits, i solved the problem by rubbing the three ribs on each needle valve with a piece of 1200 grade wet and dry a few times, from there on in no problems whatsoever, but hopefully an inline filter will cure yours.

and its still no problem kev. just been out to keep her juices flowing and fired up on the button first time. Shes been stood since well before christmas. happy daze!

Nice to know the old nail is still behaving, it took about 3 years to get her to behave when i first got her.

[d.stacey]

Thanks for all the info
Start with cleaning the tank,pea gravel and parafinn as i,m told this makes a good job