1990 indy 500 vacuum issue HELP!

D

DealrNoDeal

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Sep 16, 2009

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• Feb 22, 2012

• #1

Hi all just dug out the old 500 and it had a few cracked fuel / vaccum lines....replaced all cracked tubing but now have fuel running out the vent lines to the handlebars....ideas....not sure if a check flow is bad or just that I connected wrong.....help! and thanks

 

Jay

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Nov 26, 2007

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Smithers, B.C.

• Feb 22, 2012

• #2

A needle/seat assembly is stuck open or has a piece of junk stuck in it, or possibly the floats are sticking.

 

D

DealrNoDeal

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Sep 16, 2009

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• Feb 22, 2012

• #3

thanks

its been sitting a while....is some carb cleaner worth a shot?

 

Jay

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Smithers, B.C.

• Feb 22, 2012

• #4

If its been sitting I'd pull the carbs, take the float bowls off and have a look. See if the floats are sticking on the pins, pull your jets and see that they aren't green or plugged up. Maybe flip the float lever a few times and see that the needle isn't stuck. Gas will turn into some nasty stuff if it sits long enough, if you see obvious varnish/goo in the float bowls you should strip the carbs and clean them real good. Carb cleaner wouldn't hurt. I've seen guys burn down engines because of plugged up jets.

 

M

mcdbrendon

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Nov 8, 2010

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West Jordan UT

• Feb 22, 2012

• #5

The vent by the handlebars isnt hooked to the carbs tho it comes straight off the tank.

 

R

RED BARRON

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Jan 2, 2011

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YAKIMA, WA

• Feb 23, 2012

• #6

how full is the gas tank, if you fill the tank to the top and then sit on the front of the seat it will push gas out the vent.

 

sled_guy

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Jul 5, 2001

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Riverton, Utah

• Feb 23, 2012

• #7

mcdbrendon said:

The vent by the handlebars isnt hooked to the carbs tho it comes straight off the tank.

Click to expand...

Actually, there are 2 lines... one is the vent line that comes from the tank like you say.

But on those early 90s sleds they tied the vent tubes off the carbs together with a t and then ran them up to vent under the bar bad.

You need to find which one is spewing the fuel. If its the one on the tank then its building pressure for some reason. If its the carb ones then as other say, the needle/seat is open or the tank vent is plugged and the tank is building pressure forcing fuel through the carbs and up the overflow vents.

sled_guy

 

D

DealrNoDeal

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Sep 16, 2009

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• Feb 23, 2012

• #8

FIXED

Thanks all.....floats were glued! thorough carb cleaning and WALAH ! Awsome!