I had the misfortune of getting an expensive custom paint job by so called experts that failed miserably within days; from paint bubbles around the gas cap. (This thread started 12-3-2016 for those tracking longevity)
This was caused by gas or gas fumes getting under or between the paint and underlying metal gas tank because the rubber gasket was used improperly, with improper adhesive.
To properly fix it in my case:
1) Remove the stock Landmark gas cap
2) Remove the stock Landmark Paint Saver Ring screwed into the gas tank with the
SPECIAL Landmark REMOVAL TOOL (not shown).
2a) Landmark Removal Tool
3) In my case the Landmark paint saver ring was installed incorrectly with the rubber gasket (badly worn and not the same style as provided by Landmark) see photo below.
4) Clean up any loose material and block pieces from falling into tank with tape…
(the "clay-brownish looking stuff" in photo below was JBweld -- which I do not recommend here for this application.)
5) Re-attach loose paint bubbles with crazy glue equivalent; I used XBon super glue; other products may work as well (no luck with clear nail polish as some suggest). Wear rubber gloves in case you smear and get fingers stuck to paint, tank, etc…
6)
Contact: “MR. Wright” of this Forum to have him custom make you an oversize paint saver ring to fit your situation out of stainless steel stock. (about $35.) see below lower right in photo.
7) Dry fit all to be sure of the look and fitment, bend, etc, will work…
8) Place masking tape around area to cover where you do not want RTV silicone to go and keep it neat.
9) Assemble with RTV Silicone glue (I used clear) on the gas tank threads and top edge; then put RTV Silicone on underside of large MR. Wright ring. Place on tank wipe excess oozing off inside of tank; masking tape dam will block from falling into tank.
10) RTV silicone up the
smaller Landmark threaded paint saver ring and screw in to tank threads through center of the
larger MR. Wright paint saver ring.
DO NOT USE THE RUBBER GASKET! Or it will leak…
11) Tighten Landmark paint saver ring with tool to very snug fit or in my opinion what would be about 30 ft. lbs. of torque. The RTV Silicone will ooze out everywhere --a good thing, and wipe excess to clean up.
Recommend:
WAIT 3 FULL DAYS TO DRY WITH TANK GAS CAP OFF, NO GAS IN TANK ! in well ventilated area.
After that gas up; never fill past inside metal lower neck of tank. (As I knew from my early teens on any bike-- and you probably do too).
What I like:
The
new larger Mr. Wright paint saver ring prevents scratches in paint from finger nails and gas nozzle flex boot (in California gas pump nozzles) may scratch paint.
This fix has worked now for nearly 2 years and over 50 tanks of gas. A lot less expensive than new paint and I believe it is a much better set up than stock.
I have seen this done with the Kuryaken gas cap set up as well both look very nice!
PS: side experiment: I took a thumb nail size blob of Permatex RTV silicone after 4 hours dry time and drenched it periodically in gasoline over the 3 day wait; it never decomposed, compromised or damaged it... AMAZING!
I also bought a brand new Landmark Gas Cap (vented as original) with paint saver and removal tool included ($95.) Got it in one day since Landmark is in Oceanside, California 20 miles down the freeway.
http://www.landmarkmfg.com/
Gas Cap dis-assembled below to show vent and inspect...