Gas Cap Blues....

[rustywrench]

Burvis,
I have re-vented three of these caps after I seemingly ran out of gas one day. When I opened the cap it sucked air so I went back to the shop for a rehab job. This is how I did it.
Hold cap upside down holding it by the center part. Tap the outer edge with a small hammer until the chrome crown comes off. Good sharp raps may be required but I assure you, it will come off.
This may be a bit brutal for some folks taste, but it works. Now, there will be a rubber gizmo inside and from inside you will see that this cap vents through the center hole and through three very small holes in the outer rim of the inner half. The holes will be more visible from the inside. Less rust hopefully. On one of mine I had to drill them out. Once thoroughly cleaned, simply press all the parts together. Hope this helps, RW

[rustywrench]

Yup, That would surely work. RW

[burvis]

Ha! Now I feel like a dunce. After a half hour with steel wool cleaning the rust off, the 'speck' turned out to be a plugged up little hole after all. I drilled it out, and put an extra in for good measure. Thanks to all on the forum, I think I'm sorted out.

[Vince Lupo]

Burvis,
I have re-vented three of these caps after I seemingly ran out of gas one day. When I opened the cap it sucked air so I went back to the shop for a rehab job. This is how I did it.
Hold cap upside down holding it by the center part. Tap the outer edge with a small hammer until the chrome crown comes off. Good sharp raps may be required but I assure you, it will come off.
This may be a bit brutal for some folks taste, but it works. Now, there will be a rubber gizmo inside and from inside you will see that this cap vents through the center hole and through three very small holes in the outer rim of the inner half. The holes will be more visible from the inside. Less rust hopefully. On one of mine I had to drill them out. Once thoroughly cleaned, simply press all the parts together. Hope this helps, RW

So RW, let me ask you -- do you now have a dry gasket when you open the tank to fill it? Will this method cure this seemingly perpetual issue?

[rustywrench]

No Vince, it only allows air into the tank the way a MFG designed it. For what it's worth, since you started this thread I've watched my gasket more closely only to find the same condition as yours. Since I have never seen gas outside the gasket area, I've not been that concerned. But then my tank at this time only has a cheap paint job and it's not a burning issue, pardon the pun. When I do get a nice paint on the next tank, that ambivalence will change.
What I have found that annoys my is that the stock cap is very low profile and finger contact around the cap rubs the paint . So I may end up going to a different cap and who gives a damn if it works better. No one holds a gun to our heads making us keep our bikes year/period correct. RW

[jleewebb]

good info here:

http://www.honda305.com/forums/viewtopi ... &highlight

I got one of the modern gas caps, part #17620-402-010 from local honda dealer and it works fine, doesn't leak. I'm careful not to fill tank all the way to top, of course...

for what it's worth...

Lee