Carb questions.... - Wrist Twisters
 
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post #1 of 14 Old 06-27-2006, 06:37 AM Thread Starter
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Carb questions....

As you know I picked up an SV so that I could get my wife a bike. Well I finally got it going (or so I thought) and it is filling the crankcase with gas to the point it is over-full and is blowing oil-gas mix up into the airbox. I am not stupid when it comes to pulling carbs apart, so anyone have any ideas on why this would happen?? I just changed my needle clip position to richen the mix and only had the top of the carb off to pull the slides. Also the bike had sat for a few months before I picked it up. Anyone with any ideas would be appreciated as I am still getting aquainted with this bike.

PS. I can now remove the seat, gas tank and air box in less than 2 min!! :1eye:

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post #2 of 14 Old 06-27-2006, 06:53 AM
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My guess is the bike sitting for a few months with stale gas in the float bowls could be a clue. Only one way for the carbs. to be dumping raw fuel. The float in combination with the float valve, and float valve seat act as a hydraulic switch. If the switch is not closed the gas will continue to flow. Does the SV have a fuel pump or is it gravity feed to the carbs. In any event the carbs. must come apart and given a thorough cleaning.

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post #3 of 14 Old 06-27-2006, 06:59 AM Thread Starter
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So if the floats are stuck it will dump fuel into the cylinder all the time even if its not running??? Or only if its running?? I will have to take this apart to give it a good once over twice!! Oh and change the oil!! As for the fuel pump....I think it does because when I pull the tank no gas comes out the open hose. No "flip" switch for ON or Reserve, just a fuel light.

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post #4 of 14 Old 06-27-2006, 07:05 AM
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Quote:
Originally Posted by turn_1
So if the floats are stuck it will dump fuel into the cylinder all the time even if its not running??? Or only if its running?? I will have to take this apart to give it a good once over twice!! Oh and change the oil!! As for the fuel pump....I think it does because when I pull the tank no gas comes out the open hose. No "flip" switch for ON or Reserve, just a fuel light.
Sounds like the SV does have a fuel pump. This means there will be gas flowing only when the bike is running or the ignition is in the ON position.

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post #5 of 14 Old 06-27-2006, 08:17 AM
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Quote:
Originally Posted by m51142
Sounds like the SV does have a fuel pump. This means there will be gas flowing only when the bike is running or the ignition is in the ON position.
I'm not positive, but pretty sure it's gravity feed. There should also be a vacuum line to the fuel tank that allows gas to flow out.

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post #6 of 14 Old 06-27-2006, 09:14 AM Thread Starter
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I will have to look into this...

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post #7 of 14 Old 06-27-2006, 09:17 AM Thread Starter
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Vaccuum operated...no fuel pump

Vaccuum is a funny word. :1eye:

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post #8 of 14 Old 06-27-2006, 09:43 AM
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Quote:
Originally Posted by turn_1
Vaccuum operated...no fuel pump

Vaccuum is a funny word. :1eye:
Sheesh... Bring back the good ol' days, On/Off/Reserve mechanical petcock. From your previous post it appears the vacuum line is functioning properly.

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post #9 of 14 Old 06-27-2006, 10:37 AM
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Maybe something in these articles will show something that was missed. It's all on adjusting the carbs on a 2000 SV650

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post #10 of 14 Old 06-27-2006, 10:50 AM Thread Starter
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Ha!! Thats funny you post that...thats where I got the info to do the work in the first place. (Side not never send him money for things he sells on his site, he doenst send them or respond, just recieved my paypal claim back yesterday from him) Lots of good info, just dont send money. Yeah it doesnt really say why the carbs would leak so I'm still SOL.

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post #11 of 14 Old 06-27-2006, 11:10 AM
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You just need a carb cleaning, Floats are stuck.

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post #12 of 14 Old 06-27-2006, 11:24 AM
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I had a 97 F3 that sat for 4 or 5 months back in the day and when it came time to start her up... I had gas spraying everywhere after a few minutes....

Take that thing apart and clean it up good.

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post #13 of 14 Old 06-27-2006, 02:00 PM
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I was going to say that too, but I would assume he did that already.

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post #14 of 14 Old 07-13-2006, 11:03 AM Thread Starter
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Shes back in business now!!! Yeeeehawwwww!! (sorry havent ridden in awhile) It was a bad diaphragm on the top of the carbs. Rode last night with no problems.

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