Topic: gas cap seal

[carl550k]

 hey all, i have noticed the my 76 550 must be leaking gas from the rubber seal under the gascap. i filled the bike with gas before my ride to a friend house about 45 miles from home. no problems after returning home latter in the day i noticed what must be dried gas that has stained the tank. a few trickles down the right side. they were not there when i left my buddys place. i know the rubber seal under the cap is cracked  and brittle. do i have to replace with oem or can i make my own?  thanx carl

[csendker]

I can't imagine this is a real tight-tolerance part that would prevent you from making one yourself.  Just make sure whatever you use is gasoline-freindly (duh).  That being said, the parts fiche lists them for about $5.

036 Gasket, Fuel Filler Cap 1 $4.68 ea
( http://www.motogrid.com/pages/parts/viewbybrand/7/honda.aspx )

36 GASKET  17534-323-300  001 $5.25
( http://www.crotchrocket.com/fiche_section_detail.asp )

[carl550k]

 thanks for the info, it cant be real tight as the bottom of the cap is spring loaded. called the honda dealer its only 7 buck, but of course they have to order it. i made one out of the rubber gasket material i used to make my discs for under the cylinder head.they held up great. it just requires a little more umph to close the gas cap, since i put the old one back in and put my homemade on top of it. will see if it works after my next ride.  carl

[csendker]

You might not want to put too much pressure on the cap latch so as not to break the little hook thing.

[carl550k]

 shouldn't be too bad as the original latch was replaced years ago with a locking one. besides even with the cap latched it feels spring loaded. it will still move a little up and down.

[Johnie]

I am going through the same thing with my CB750KO and I am trying to solve that problem before I have the tank painted this winter. I put a new gasket on and it still leaks if I fill it.  The guy doing the paint said to put some silicone on the lip of the tank and that will seal up good everytime I close the cap.