socalyamaha Posted December 11, 2007 Share Posted December 11, 2007 my petcock was leaking, so rebuilt i rebuilt it. all new gaskets and vacume still leaking on and res settings. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted December 11, 2007 Moderator Share Posted December 11, 2007 my petcock was leaking, so rebuilt i rebuilt it. all new gaskets and vacume still leaking on and res settings. Is it through the lever? Link to comment Share on other sites More sharing options...
socalyamaha Posted December 11, 2007 Author Share Posted December 11, 2007 Is it through the lever? no, the fuel line. i set it to on and it leaks. i set it to res and it leaks. half way between them both and it leaks. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted December 13, 2007 Moderator Share Posted December 13, 2007 no, the fuel line. i set it to on and it leaks. i set it to res and it leaks. half way between them both and it leaks. I'm assuming that you mean it has free fuel flow rather than an external leak? is the lever hard to turn?, it should do as i have rebuilt mine and it is stiff, you need to make sure everything is in the right order off a parts or workshop manual (you can see an online version at motogrid) ensuring the rubber is the right way round and covering the right holes etc. Link to comment Share on other sites More sharing options...
socalyamaha Posted December 13, 2007 Author Share Posted December 13, 2007 I'm assuming that you mean it has free fuel flow rather than an external leak? is the lever hard to turn?, it should do as i have rebuilt mine and it is stiff, you need to make sure everything is in the right order off a parts or workshop manual (you can see an online version at motogrid) ensuring the rubber is the right way round and covering the right holes etc. yes, free fuel flow. the bottom gasket can only go in one way. done. the round four holed gasket behind the lever is the the same both sides. done. the vacume gasket, little hole in the membrane lined up with the little hole in the plastic plate. spring is against the back of the cover. o ring facing through "tunnel" to lever side. done. ???? Link to comment Share on other sites More sharing options...
bralkan Posted December 15, 2007 Share Posted December 15, 2007 yes, free fuel flow. the bottom gasket can only go in one way. done. the round four holed gasket behind the lever is the the same both sides. done. the vacume gasket, little hole in the membrane lined up with the little hole in the plastic plate. spring is against the back of the cover. o ring facing through "tunnel" to lever side. done. ???? I am having a similar problem: http://www.yamahaclub.com/forums/index.php...amp;#entry47881 Have you had any luck? Link to comment Share on other sites More sharing options...
socalyamaha Posted December 15, 2007 Author Share Posted December 15, 2007 I am having a similar problem: http://www.yamahaclub.com/forums/index.php...amp;#entry47881 Have you had any luck? not yet. the bike only has 5900 miles on it and i rebuilt the petcock, there should not be a problem. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted December 15, 2007 Moderator Share Posted December 15, 2007 not yet. the bike only has 5900 miles on it and i rebuilt the petcock, there should not be a problem. just buy a new one and have done, its not having it!, so bite the bullet. if you were in the uk i would have looked at it for you. Link to comment Share on other sites More sharing options...
bralkan Posted December 15, 2007 Share Posted December 15, 2007 just buy a new one and have done, its not having it!, so bite the bullet. if you were in the uk i would have looked at it for you. I talked to my mechanic and he doesn't think its the petcock (i looked at it and it looked ok - not that I know exactly what I am looking for). He suggested tapping the floatbowls to see if anything is stuck in there - would that cause it to free flow out the air intake? Link to comment Share on other sites More sharing options...
yoda Posted December 15, 2007 Share Posted December 15, 2007 I talked to my mechanic and he doesn't think its the petcock (i looked at it and it looked ok - not that I know exactly what I am looking for). He suggested tapping the floatbowls to see if anything is stuck in there - would that cause it to free flow out the air intake? When you wrote to say that your petcock was leaking, why did you not write and tell us that fuel was leaking out of the carbs. That is a different story to a petcock leak. Fuel is leaking out of the carbs (how many?) because the float is not sealing off the inlet That is a seperate problem to a leaking petcock Link to comment Share on other sites More sharing options...
socalyamaha Posted December 15, 2007 Author Share Posted December 15, 2007 When you wrote to say that your petcock was leaking, why did you not write and tell us that fuel was leaking out of the carbs. That is a different story to a petcock leak. Fuel is leaking out of the carbs (how many?) because the float is not sealing off the inlet That is a seperate problem to a leaking petcock my problem is the vacume doesn't work the way it should. no fuel should be coming down the fuel line to the carbs when the engine isn't running. you should check your float bowls. Link to comment Share on other sites More sharing options...
bralkan Posted December 15, 2007 Share Posted December 15, 2007 When you wrote to say that your petcock was leaking, why did you not write and tell us that fuel was leaking out of the carbs. That is a different story to a petcock leak. Fuel is leaking out of the carbs (how many?) because the float is not sealing off the inlet That is a seperate problem to a leaking petcock I had in the thread I linked too. I assumed it was petcock at first because I am a nub. I knocked around the floatbowls and it runs now. Should it clear itself or will I have to empty the bowls? edit: throttle is jerky sometimes / unresponsive - is the debris just floating in and out of the jets / whatever? Link to comment Share on other sites More sharing options...
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