Someone forgive me - I feel like a "dirty" criminal, kinda like I just ripped the tag off my matriss :P
These are one on those classic mods that gives the best bang for the buck (no pun intended) - actually FREE! One of those "why didn't I do this long ago". Mod was simple as grinding down the cone or fill funnel on a flatbed sander.
I did not have the leaky cap (yet), but only having this bike a little over 10 months ... this mod was already way OVER DUE! I couldn't stand fill-up time... you stick the nozzle in and use mental telepathy to sense when the tank is full. Sorry... my mental powers are not so much. But now that the mod is done, I feel like an environ-criminal (cough cough - being sarcastic)!! You all do know why that hole is so small right?? You guessed it - save the planet regs - much to regulate the nozzle size - right, like there's really is any leaded pumps still in existence!! But also to reduce potential hydrocarbon release (aka raw fuel vapors). Screw it I say, "I" much rather be a little more safe and visually monitor my fill-up procedures.