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View Full Version : gas leaking......


kicker696
08-31-2002, 09:11 AM
ok, i run my 400 on reserve all the time, and always check for gas, my prob. is after i run through a woops section, gas leaks out of the over flow tube. How can i fix that?
250xman
08-31-2002, 09:34 AM
theres only 2 ways to fix it. 1 buy a new carb for racign and it doesnt let that happen cuase it was built for things like that. 2 theres a kit that mikuni make to covert there carbs to some kind of carb that wont let that happen. they have the kits at dennis kirk for like 30 bucks.
kicker696
08-31-2002, 12:41 PM
what is it?
kicken250x
08-31-2002, 12:59 PM
you really shouldnt run your bike on reserve all the time it dont let it get as much gas or something like that
kicker696
08-31-2002, 02:43 PM
i was told that if u did run it on reserve, then it got more gas
kicken250x
08-31-2002, 03:23 PM
well ive benn wrong befor i could be now idk...
MichaelS693
08-31-2002, 03:53 PM
Originally posted by kicken250x
well ive benn wrong befor i could be now idk...

no offense but you are wrong now cuase when you have it on reserve you do get more gas flow
kicken250x
08-31-2002, 03:59 PM
oh none taken i like to be corected when im wrong so i dont tell someone else the wrong thing. i still dont understand this one tho?? you have no gas already when you put it on reserve so why would it feed the bike more gas? im stumped...
MichaelS693
08-31-2002, 04:40 PM
its hard to explain the only thing i could figure out why is cause like UHHHHHHH hard to explain like you know you can run out of gas while it is regualrly on on and then put it on reserve and it will run cause there is just that little bit of gas left its hard to explain ha my bad if i have confused anyone or i am wrong
400exRacerX
08-31-2002, 09:54 PM
You get the same amount of gas to your carb no matter what setting the petcock is on. Your quad needs to maintain a certain float level in the floatbowl in order to run properly.

My stock 400ex carb did the same thing when I would hammer on it in the whoops and jumps.
kicker696
08-31-2002, 11:35 PM
it won't stop leaking now, what do i do to get it to stop?
L.Vegas400
09-01-2002, 04:28 AM
clean your carb. sounds like there is a float stuck, thinking it needs more gas all the time, thus overflowing.
09-01-2002, 04:52 AM
Originally posted by MichaelS639


no offense but you are wrong now cuase when you have it on reserve you do get more gas flow All reserve is a little tube in the bottom of your gas tank and it sticks up like a 1/4inch and when you put it on reserve instead of sucking gas from the tube that is a 1/4inch higher its sucks from the very bottom of the gas tank so it lets you run alittle longer. Understand now? It does not give you anymore gas flow, reserve just sucks gas from the very bottom of the tank. Thats why if you look 1 time when you have gas on and not reserve and you run out and look in tank there is still gas there because the tube is higher and thats where its sucking gas from but when you turn reserve on its like taking the tube out and it sucks from the very bottom of the gas tank.
kicken250x
09-01-2002, 09:56 AM
oh ok i got ya now...
L.Vegas400
09-02-2002, 05:14 AM
there might also be a little screen on the reserve tube in the bottom of the tank to keep it from sucking up particles, or at least there was on my 81 yamaha.