qwerty_100
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| posted on 31/5/14 at 05:01 PM |
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suzuki gsx carbs over fueling
Good evening all, I have finally got my Vauxhall red top running on gsxr carbs the only issue is there are two small holes on the front of the carbs
were the air box goes and fuel is squirting out of the left one it is worse on the bank feeding cylinder 3&4 things I have done so far.
1) striped down and cleaned and made sure the valve is closing, and it is.
2) I am using a pump from Kawasaki ZZR 1100 plus have tried two regulators down to 1 psi according to the gauge.
3) filled external tank and gravity feed the carbs and this was even worse.
Is this just a case of using a very low pressure pump like a solid state facet. The fuel comes out a quite a rate but as said have had
pressure right down. Does anyone know of this issue and could it be a fault or just keep trying many thanks all.
Kev
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sjmatthews
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| posted on 31/5/14 at 06:36 PM |
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Check the float levels?...
I'll be in the garage dear!
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matt_gsxr
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| posted on 31/5/14 at 08:16 PM |
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gsxr carbs were all gravity fed (no pumps) in the bike install.
I ran mine with a zx9 pump and it was alright enough to pass SVA, but did get the odd leak (scary in a fibreglass car), so I swapped to EFI.
A complete refurb kit might have fixed it, but this was quite expensive and I fancied EFI.
The general advice for bike carbs is to use bike fuel pump as the pressure is nice and low.
http://jpsc.org.uk/forum/
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Dingz
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| posted on 31/5/14 at 10:18 PM |
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Hi Kev check the needle valves again, bike carbs seem to be more sensitive to grit than 'normal' carbs. also what have you done with the
breathers, they should be just left open.
Phoned the local ramblers club today, but the bloke who answered just
went on and on.
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qwerty_100
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| posted on 1/6/14 at 06:45 AM |
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Thanks Guys
I will go and check/set the float heights and recheck and clean the needle valves, I am using a pump from ZZR1100 but this may be to
powerful will try and locate one from ZX9 once again thanks for all the help will let you know how I get on later cheers Kev
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maccmike
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| posted on 1/6/14 at 09:24 AM |
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Your pump cuts off when your floats are full, so that aint your problem. Where is it overfueling?
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qwerty_100
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| posted on 1/6/14 at 09:35 AM |
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That seems to be the problem the pump slows but does not shut of when bowls are full, have tried a second pump and this does the same I have taken
carbs off again and am setting float heights but I suspect that the needle valves may need replacing. The fuel is coming out of the air jet on the
left hand side on the front of the carb. I have read that these carbs need very little pressure so maybe an even weaker pump???? Just grabing at
straws now but will eliminate one thing at a time. When it runs it does sound good though cheers for all the continued help Kev
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qwerty_100
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| posted on 1/6/14 at 11:10 AM |
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Am I one happy bunny. Reset float heights cleaned again jets and needles again as soon as I heard pump run then stop I knew it was fixed. A massive
thanks to all for your help and advise keeping sain and focused always helps cheers Kev
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