XT600 gas cap not venting Tenere tank?
I have an XT600 gas cap that I'm using with a Tenere gas tank and have been having problems with venting as the fuel level drops. With a full tank, the weight of the gas keeps the carb supplied with fuel, but as it drops, the vacuum becomes too great. I actually noticed a gurgling sound as I brought the bike out of the garage today; fuel getting sucked out of the carb and back into the tank due to the vacuum! No wonder I was having starting problems.
What can I do? I removed the metal plate around the base and that didn't solve the problem. The previous owner had actually pried it up with washers?! I tried another unmolested cap and had the same problem (I'd open the petcock and fill a jar with fuel, and the flow would slowly diminish, then stop). I could clear out the gasket in the cap as well and have a free-flowing setup, but my concern is that if fuel splashes in there it will block the flow of air.
Are there any available vented gas caps? Or should I tap a hole, put a nipple in there, and run a vent hose?
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