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Zx6R Carbs. What Have I Done Wrong?


Thrashed

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Hi guys

 

Well the car is back together and having sat stationary for 6 hours with all fluids in it looks like i might have achieved the holy grail and got a leak free pinto. Not yet driven it or started the engine but so far so good.

 

Went for an engine start and i now have petrol pouring our of the carbs! I had them apart a few weeks ago for a good clean and put them back together as i took them apart. I also have a tube on the top of the carbs that is 2 pipes into one and i have fuel pouring out if this too? Never had this issue before.

 

Will it just be the floats being stuck or have a made a school boy error putting them together?

 

Thanks in advance

 

Steve

Edited by Thrashed
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Update..

 

So, tapped each float bowl and no difference, so pulled the carbs off and opened up the float bowls.

 

If carb 1 is closest to the throttle cable connector they look like this

 

Carb 1 - https://drive.google.com/file/d/0B9bIjPmpA0E5eS1PdEZ6eml6aFE/view?usp=sharing

Carb 2 - https://drive.google.com/file/d/0B9bIjPmpA0E5Qk5YSUpiOEswTEU/view?usp=sharing

Carb 3 - https://drive.google.com/file/d/0B9bIjPmpA0E5VkVsOVBoZGczSFU/view?usp=sharing

Carb 4 - https://drive.google.com/file/d/0B9bIjPmpA0E5bjhwdG5YcUF0dWs/view?usp=sharing

 

Carbs 3 had the float spring half off so guess this caused part of the issue.

 

The second question is for the float needle does it matter which way round the spring sits?

 

Carb Needle - https://drive.google.com/file/d/0B9bIjPmpA0E5Q0E2bXMzY0dMdmM/view?usp=sharing

 

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So....

 

been messing on all day without success. Fuel is still pouring out.

 

I have had them apart 3 times today and tried the needle value in both positions and this makes no difference.

 

I then started to look as what could cause the issue and starts experimenting! I placed the floats and needle values in place and with my finger rest on the top of the valve very gently blew air through the fuel feed pipe and the air could be heard escaping? Took the value and flow out and put my finger over the end of the hole where the needle value fits to shut of the fuel supply and air was escaping still. It appears to be from the sides on the needle value housing.

 

Now, in my cleaning process, could i have got a bit over excited and cleans to well and destroyed the o ring at the bottom of the housing with carb cleaner?

 

I am now at a total lose and have no idea what to even look at next.

 

Any clues?

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Your reasoning could well be right, the O rings for unleaded fuel will be Viton, but the solvents in the carb cleaner will attack them.

Hi Peter

 

Think you are right. Where the float valve seats the bush is removable. Pulled this out and the o rings look a bit iffy. Still flexible but covered in a whitish haze and the end of the float valve is a rubber type material.

 

Cleaned them both off in some petrol and have refitted.

 

Good news is that they have now stopped flooding, yiippee. Just need to see if it will start and run now!

 

Wish me luck.

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