Suzuki 2 Strokes

I'm repairing my 76 GT500 gas tank--derusting, POR-15, petcock cleanup and vacuum bypass modification, etc.

The fuel cap won't snap down flush with the filler neck, even when I apply enough pressure to "oil can" the metal on the top of the tank. The latch mechanism clicks open and shut fine, but the back of the cap sits about 1/8" above the rim of the neck when it's in the "latch" position.

I have a new cap gasket and have fitted it both sides up with no change.

Any ideas?

Have that problem with one of my gas caps.
The bike was rekeyed by the PO & the gas cap wasn't assembled correctly.
See pic in this thread: viewtopic.php?f=9&t=8742&p=131994&hilit ... ly#p131994

This is helpful. Thanks.

To the Batworkbench, Robin!

Is it possible to purchase a new lock set for a cap or does it have to be re-keyed or replaced with a complete new cap?

The gas cap can be disassembled, but I'm not exactly sure how. I used a gas cap off of a project bike.
The underside of my gas gap was marked up from someone having done that.

I've never seen anything that would suggest that Suzuki sold replacement lock cylinders.