Z9 A4
Carbs keep leaking out of the Overflow pipes and occasionally out of the back of the carbs.
I've tried float heights, float valves and nothing will stop it. Stops for an hour or so but then starts again.
Can anyone guide me in the right direction please?
Hello Guest User,
Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.
To access these 'Registered Users Only' areas simply register and login.
Please feel free to have a look around the forum but be aware that as an unregistered guest you can't see all of it and you can't post.
To access these 'Registered Users Only' areas simply register and login.
Carbs help please
Moderators: chrisu, paul doran, Taffus, KeithZ1R
-
- Hardcore
- Posts: 2051
- Joined: 3rd Apr 2009
- Location: leverington UK
Re: Carbs help please
Has to be float valves letting by.
Re: Carbs help please
If out brass overflow - they can split internally!
And on the 7th day... Zeds were created!
Re: Carbs help please
Have you done the following:
Replaced the float valves, seats and washer?m (Even when slightly worn they can leak).
Checked the actual fuel height, not just measured the float height? (Often the actual fuel height can be incorrect even though you've set the float height correctly).
Fitted an inline fuel filter? (To prevent crap finding it's way into the carb and jamming the fuel valve).
Replaced the float valves, seats and washer?m (Even when slightly worn they can leak).
Checked the actual fuel height, not just measured the float height? (Often the actual fuel height can be incorrect even though you've set the float height correctly).
Fitted an inline fuel filter? (To prevent crap finding it's way into the carb and jamming the fuel valve).
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.
Re: Carbs help please
Thank you everyone, I will carry on and check w eh by what you have suggested
Re: Carbs help please
first thing to check is is fuel tap passing if it is sort that first and it will probably sort the problem.
-
- ZedHead
- Posts: 1128
- Joined: 11th Sep 2012
- Location: Reading
- Contact:
Re: Carbs help please
weaver wrote:first thing to check is is fuel tap passing if it is sort that first and it will probably sort the problem.
The carbs shouldn't overflow because the fuel tap lets petrol through. It will let you mask the problem though.
Cheers,
Mark.
Mark.
Re: Carbs help please
needaz1100r wrote:The carbs shouldn't overflow because the fuel tap lets petrol through. It will let you mask the problem though.
I agree. Would only overflow if the fuel height is too high, the the float valve is leaking, or a float is suck.
http://www.airevalleyclassics.co.uk
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.
10% discount code Z1OCTEN
Keyster rebuild kits & carburettor spares - airscrews, jets, needles, starter plungers & gaskets.
Also petrol/ethanol proof float bowl gaskets. IMD pistons preferred seller.
Re: Carbs help please
needaz1100r wrote:weaver wrote:first thing to check is is fuel tap passing if it is sort that first and it will probably sort the problem.
The carbs shouldn't overflow because the fuel tap lets petrol through. It will let you mask the problem though.
true but if you fix the fuel tap you will never have a problem with carbs over filling again if its your float valves that are passing.
-
- ZedHead
- Posts: 1128
- Joined: 11th Sep 2012
- Location: Reading
- Contact:
Re: Carbs help please
weaver wrote:needaz1100r wrote:weaver wrote:first thing to check is is fuel tap passing if it is sort that first and it will probably sort the problem.
The carbs shouldn't overflow because the fuel tap lets petrol through. It will let you mask the problem though.
true but if you fix the fuel tap you will never have a problem with carbs over filling again if its your float valves that are passing.
That's only true while the fuel tap is off and presumably the engine not running, if your float valves are passing they can't maintain the correct fuel level when the tap is on, how do you know the level is correct when the bike is running? It might not come out onto the floor, but could be drawn into the engine causing rich running, or at least poor fuel consumption.
Cheers,
Mark.
Mark.
Re: Carbs help please
the op has tried everything inside the carbs to no avail,if the tap is vacuum operated and is passing with the engine off the head of fuel will push petrol past the float valves,sort this and job done.
Who is online
Users browsing this forum: No registered users and 196 guests