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Message started by JohnBoy on 10/16/11 at 20:53:56

Title: leaking fuelcap vs expanding gasoline ?
Post by JohnBoy on 10/16/11 at 20:53:56

I have had two or three gas cap leaks on this bike and I have had leaks on other bikes as well. Almost all are on a full tank and right after filling up. on a warm to hot day.
Any ideas on the amount of expansion that the relatively cooler gas in an underground tank will experience when it is pumped into a hot tank sitting in the afternoon sun? I seem to remember reading that it was as much as 15%? Any idea of how much time it takes for gas to expand?

I'm guessing that it's just enough time to notice that my cap is "leaking" on my pants again :)

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by justin_o_guy2 on 10/16/11 at 20:57:35

Stop at the bottom of the tube,,

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by Serowbot on 10/16/11 at 22:46:49

Stop at the bottom of the tube,... with the bike in the upright, horizontal position...
Stop way before that, if you're on the kickstand...


Title: Re: leaking fuelcap vs expanding gasoline ?
Post by MotoBuddha on 10/17/11 at 05:28:16

Ride faster, burn the gas.

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by arteacher on 10/17/11 at 15:57:50


4F6D766D407766666A63020 wrote:
Ride faster, burn the gas.

I always fill mine to the bottom of the tube while on the kickstand just before a ride. Since I fixed the gas cap leak (finally!) I haven't had a problem.

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by Starlifter on 10/17/11 at 20:22:05

Sometimes I have to ride a long way with no gas stations. I fill her to the brim and stuff part of a paper towel under the cap for the first few miles.

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by arteacher on 10/18/11 at 04:52:34


456277647A7F70627364160 wrote:
Sometimes I have to ride a long way with no gas stations. I fill her to the brim and stuff part of a paper towel under the cap for the first few miles.

What does that do to help?

Title: Re: leaking fuelcap vs expanding gasoline ?
Post by dasch on 10/18/11 at 10:34:02


2C0E150E231405050900610 wrote:
Ride faster, burn the gas.


Yeah!!!

Just don't fill to the brim, and you're set.

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