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Carbs and Fuel System
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  Topic Review (Newest First)
07-07-2008 11:57 AM
Sky Rider You are missing the spring.
07-06-2008 09:12 AM
jmczzz when I dissasembled my bikes's petcock there was not a spring behind the vacumn diaphram as pictured in the on line manual. Is the spring a change from 89 or is it missing the spring?
07-04-2008 12:39 AM
Knifemaker
Quote:
Originally Posted by tprender View Post
Didn't know that Kaw had changed to the ON/Off petcock. There are still using the vacuum petcock on there atv's. So, I though that it was still in use on the bikes. .
Just so you understand here, the on/off petcocks still require a vacuum line to work. They are NOT gravity feed. Only the "Prime" function on the older petcocks would bypass the vacuum switch and let gas flow without there needing to be negative pressure from the engine.

KM
07-03-2008 11:56 PM
tprender Didn't know that Kaw had changed to the ON/Off petcock. There are still using the vacuum petcock on there atv's. So, I though that it was still in use on the bikes. I like the ON/Off petcock better that the gravity one. This way I know that the fuel is turned off during the winter. I know that it has fuel when trying to start the bike after it has been sitting for some time when it get's hot and the gas might dry up.
07-03-2008 08:31 PM
Knifemaker
Quote:
Originally Posted by DeForestSD View Post
BTW: Anyone have an opinion as to which petcock is the better design?
Better?

Neither really. Most of the problem is the placement..the tank angles down to the back of the bike, so even after you run out of gas while on reserve..you still have gas in the tank...thus, a bad design.

I like the idea of the "prime" as it allows you to pull of a fuel line and drain some gas when the bike is not running. ( A wonderfull on the spot hand cleaner if you just stopped to fix some pretty womans flat)

But then again, having a "off " can be very handy when the petcock starts leaking..

So, if both types are working the way they are designed...meaning they only flow gas when the engine is running...I'll take the one with the Prime function over the Off position.

But that's just my opinion...

KM
07-03-2008 12:45 PM
slimvulcanrider yes mines a 92....with an 89 petcock
07-03-2008 11:04 AM
DeForestSD BTW: Anyone have an opinion as to which petcock is the better design?
07-03-2008 11:02 AM
DeForestSD A previous post just said it was changed after '91. You have a '92, right?
07-03-2008 09:36 AM
slimvulcanrider
Quote:
Originally Posted by tprender View Post
On the vacuum petcocks you can't turn off the gas. It does no good to turn the lever. Remember that the only positions on the petcock are Prime- On- Reserve. When you turn the lever you are putting it to reserve or prime.
If this is so..how come when I turn off the fuel...the bike burns the fuel in the carbs then dies???
07-03-2008 06:11 AM
750Doug I don't ever close mine, not on this bike or my last 3. The couple times I did for some reason, I always forgot to turn back on and then was reminded as I was blasting down the road....

And the reserve in the tank is just a small tube sticking up from the valve...
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