Is there something I should put on the gasket? Most of the time, it's super hard to turn....almost to the point of wondering if I'll be able to get it on or off.
I haven't had any trouble with my TW gas cap, but I have a KTM bike that can be a real pain. I've discovered a trick that is a bit silly, but works as long as there is a little gas in the tank. I shake the bike up and down so that gas splashes on the bottom of the cap, then it twists off with ease. I'm going to try the engine oil as lizrdbrth mentioned, my fear is that it will get washed way by the gas, but maybe it will soak into the rubber gasket somewhat?