put on new fuel tank no fuel out pet cock ?? - Kawasaki KLR 650 Forum
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post #1 of 9 Old 07-11-2010, 01:34 PM Thread Starter
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put on new fuel tank no fuel out pet cock ??

I put a new fuel tank on 2002 klr 650 and no fuel comming out petcock, do i have to prime carb to start? Dont understand why fuel not exiting tank? Is there a trick?
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post #2 of 9 Old 07-11-2010, 02:20 PM
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Did you reconnect the vacuum line to the back side of the petcock?

If you did, the engine turning over should produce enough vacuum to open the petcock, but just opening the petcock without vacuum applied to the backside of it won't let gas out.

It's a "feature".

Tom

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post #3 of 9 Old 07-12-2010, 01:51 AM Thread Starter
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I connected hose to petcock to front top of carb ,but turning over did not let fuel out of tank. is that the location to put vacume hose from petcock?
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post #4 of 9 Old 07-12-2010, 09:49 AM
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The petcock should have two "barbs", one with a 90 turn down for the fuel line, another coming straight out of the petcock for the vacuum line.



This is where the vacuum line attaches to the carburetor, supplying the vacuum to actuate the petcock.

You should have two lines running from the petcock, one for gasoline, one for vacuum.
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post #5 of 9 Old 07-12-2010, 10:34 AM
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This may be a dumb question, but do you know for sure and certain that this petcock was working before you replaced the tank?

If it is questionable, you might be better off to install a non-vacuum operated petcock and save all the troubleshooting pain.

The Yamaha Raptor petcock is a drop in replacement and about $25.

Tom

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post #6 of 9 Old 07-12-2010, 02:30 PM Thread Starter
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thank you tom, yes it was hooked up correctly, the tank had to be replaced due to rust.
You have been lots of help.

thank you for the pics vatrader ....Julie
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post #7 of 9 Old 07-12-2010, 03:33 PM
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Quote:
Originally Posted by julies klr650 View Post
thank you tom, yes it was hooked up correctly, the tank had to be replaced due to rust.
You have been lots of help.

thank you for the pics vatrader ....Julie
Humor me and re-check the condition of the vacuum line for a kink, split, hole, anything that might restrict a good draw to the petcock. You can also check the petcock vacuum function by putting a chunk of hose on the vacuum barb and sucking on it. If you pull the fuel line at the petcock, you can see if gas is flowing or not.
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post #8 of 9 Old 04-16-2012, 10:55 PM
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question

Quote:
Originally Posted by Tom Schmitz View Post
This may be a dumb question, but do you know for sure and certain that this petcock was working before you replaced the tank?

If it is questionable, you might be better off to install a non-vacuum operated petcock and save all the troubleshooting pain.

The Yamaha Raptor petcock is a drop in replacement and about $25.

Tom
hey so the non-vacuum will work ,with no problems,,understand have to cut fuel every time stop an not running.....
but other wise just switch then an plug top of carb that was the vacuum(this doesnt hurt any thing???
any info!!??
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post #9 of 9 Old 04-16-2012, 11:23 PM
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wnc/mtn=klr -

Here's the complete 411 :

Petcock Upgrade

T

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“Neither of the two people in the room paid any attention to the way I came in, although only one of them was dead.” -Philip Marlowe

“'Why' and 'How' are words so important they cannot be too often used.” -Napoleon Bonaparte


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