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I have a 1998 Yamaha 600 Grizzly.I was having a problem with gas coming out discharge hose off carburetor.Someone told me to tap bowl, that maybe float was sticking.It didn't work still leaked.He then

Quad turns over but won't fire up

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The suggestion you received of tapping the bowl is one that sometimes works. I think this time NO. Remove the carb bowl, and check to see if the float is plastic, brass, or foam (hard pressed plastic). Plastic and brass can leak gas inside weighing float down, shake float and listen for gas slushing around inside float. If you have one of those hard pressed plastic floats, they also absorb gas and become heavy and incapable of floating. In this case replace what you have, with a new float. Also check the needle valve tip, if broken replace. The quad will turn over, but not start because engine is flooded. Remove plug and let inside dry out, replace everything and you should start OK. GOOD LUCK FRIEND.

Posted on Dec 01, 2014

  • wayne
    wayne Dec 02, 2014

    thank you.i was able to get it going.


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Take off bowl and inspect needle valve on float

Posted on Dec 01, 2014

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Posted on Jan 02, 2017

cape cod bob
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SOURCE: gas leaking from hose that is under tank that is not for gas flow

is it an overflow from the carb? gas will only be in one of 2 tubes and they are the fuel line from the tank and the carb over flow. unless you have an electronic fuel pump then tubes go from tank to pump to carb. if its coming from the overflow then you are getting too much fuel into the carb float chamber. you may have a sticky float. thy getting some Berrymans B12 fuel additive and putting double the doseage in the tank. run engine til hot then leave it to stand overnight. this should break down any gum/varnish that has built up in the system

has this been in storage thru winter?

Posted on Apr 02, 2009

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SOURCE: 1998/99 kx 125 fuel leaking from carb outlet at bottom

sounds like the needle and seat may be the problem

Posted on Apr 15, 2009

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SOURCE: Leaking Fuel tap (petcock)

This sounds like a vacuum lock pet ****. 3 position? run, prime,and reserve? If you have it on pri, You will fuel running or not. If set on run, then you will only pass fuel when engine is running, and of course res. when tank is used up. Is this leak at the valve? or from the tank or internally flowing? Tis should also be a gravity feed fuel system, please correct me if I'm wrong. good luck. Long fuel lines are not prefered on gravity feed systems.

Posted on May 21, 2009

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SOURCE: 1986 Yamaha Radian stops running after 20 minutes

Sounds to me like it could be a few things... pretty interesting that it runs and shuts down...sits for a little while then fires back up. Could be something as simple as a bad ground.. maybe it needs cleaned.. if the ground is making very little contact.. the bike would run bad, and because its direct current it has to flow. The metal in the motor frame etc will hold so much DC current.. but *** soon as it load up the bike would stop sparking. Let it sit for a while, DC trickles into the battery through the slight contact, bike fires back up. OR could be bad venting of your fuel tank, or a partial clog at the pet ****.. the first is pretty easy to check, open your fuel cap and start the bike..if it does the same thing then its not a vent problem. One thing that does happen on the Radian, is the reserve fuel screen inside the tank comes loose, and then everything inside the that has built up over the years either partially clogs the pet ****, or the hose, or both. Take the tank off, pull the pet **** off..if it still has two intact tubes with good probably don't have any junk in your line..but I would pull the line off and blow through it any way... it could be some type of blockage, when the bike sets the fuel seep through, but when it runs it eventually creates a vaccuum that stops the fuel flow. Those are my two first thoughts... good luck!!

Posted on Jun 07, 2009

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SOURCE: my 1998 Dyna has a small leak or drip coming from petcock

Sounds like you have a hole in the vacuum diaphragm that opens and closes the petcock. This is one of the problems with the vacuum operated device. The other problem is that sometimes they don't open and you're left stranded with a full tank of gas and not a drop in the carburetor. I changed to a manual operated petcock. Personally, I'd rather have a Pingle petcock than another vacuum operated Harley petcock. If you do change to a manual operated petcock, don't forget to plug the small vacuum hose.

If you want to keep your vacuum operated device, I think you can buy a replacement diaphragm. You will have to drain the tank and remove the petcock. There are four small screws on the backside. Remove the screws and the backplate will come off. The diaphragm and a sping is all that is in that section of the petcock.

Posted on Apr 01, 2010

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