petcock assembly leaking

[hipshot]

i am at a loss, here.

three months ago, i did the starter clutch repair. i put 3 gallons of gas and 1/2 can of sea foam in the tank, started it and let it idle for about 20 minutes.this morning i went out to the shed to start it a(first time i've been out there in 3 months), and my gas tank is empty!!!!

could it be that the sea foam in that concentration, caused the petcock gasket to deteriorate?

any other ideas as to WHY?

just jt

[GigaWhiskey]

I have no idea but wonder if there was gunk down there that was sealing it and it cleaned it up. Now it leaks and it took all this time for it to rear its head. Just a thought.

[5bikes]

After sitting 4 years mine leaked from:

1. Gas sending unit on top of tank, rubber seal bad and no rubber washer on loose bolts

2. Cracked fuel hoses every where under tank. Also loose clamps. Replaced everything.

3. Petcock was stuck in open position, after cleaning leaked. Bad o-ring/seal.

4. Rusted tank

Put gas in it, then place paper under bike to help find leaks