Gas Caps

[kparkfan]

Where is the best place to get a gas cap. I have tried carbkitcapital.com and partsnmore.com,but they are out of stock. I really dont wanna shell out $100 for an oem gas cap.

[Dogma]

Surely someone around here has a spare to fit an '82 G. If I had one, it'd be yours.

What's wrong with it, anyway?

[ndaugbjerg]

kparkfan,
I have an '81 GS450EZ. Doing a cafe project and have installed an Aston cap and don't need the OEM cap. See if it's a match and it's yours.
Niels

[kparkfan]

The reason I'm replacing the the cap is my petcock is giving me problems. I have replaced the oring,washers,and bolts with new oem. But I am still getting gas leaking from the bolts. So I'm thinking my gas cap vent is bad and is causing the pressure to push the gas out through the bolts. If that is even logical.

[salty_monk]

Run it 1/3rd full without a cap on or with a bung with a big vent hose attached to test.

Would be quite surprised if this is your issue!

[Dogma]

The reason I'm replacing the the cap is my petcock is giving me problems. I have replaced the oring,washers,and bolts with new oem. But I am still getting gas leaking from the bolts. So I'm thinking my gas cap vent is bad and is causing the pressure to push the gas out through the bolts. If that is even logical.

The cap on my 850 can be disassembled (I did it when I was having flow problems). The vent includes a very simple and pretty robust check valve. If you can get it apart to clean and check for proper function, you can move on to other possibilities.

[kparkfan]

I'll have to try that. The petcock is new the mounting surface is clean so it has me baffled.I've gotten to ride once this year and its kinda pi$$ing me off

[Dogma]

Is it getting past the o-ring gasket thing or the sealing washers or what? It only leaks when the tank is warm?

[kparkfan]

Is it getting past the o-ring gasket thing or the sealing washers or what? It only leaks when the tank is warm?

It's getting past the sealing o-ring. I put the new one in on Sunday and Tuesday when it got warm out it was leaking. I was thinking that if the vent on the gas cap wasn't working it might be acting sort of like when you have a gas can and it isn't venting it starts to expand. Only in the gas tank it is escaping out around the petcock.

I got ahold of z1 and they said that there is only 2 gas caps for my bike anywhere in the U.S. I found a new one on eBay in the U.K. for $31 just might take a while to get here but will save me about $60.

[kparkfan]

Well I took the gas cap off for a couple of days and dried the petcock off but it still leaks. I'm lost as to what can be causing it to leak. It was fine when I put it up for the winter.

[kparkfan]

Ok I ordered me a new petcock from buelavard suzuki since they had them for cheap and I also have a new gas cap coming. Hopefully this will cure my problem so that I can get back out on the road..

[old_skool]

The reason I'm replacing the the cap is my petcock is giving me problems. I have replaced the o'ring,washers,and bolts with new oem. But I am still getting gas leaking from the bolts. So I'm thinking my gas cap vent is bad and is causing the pressure to push the gas out through the bolts. If that is even logical.

Not to sound condescending, but it's probably just a surface to petcock or gasket thing, make sure all mating surfaces are clean and EVEN, no residual gasket material, chipped paint on the tank causing unevenness, etc, unless the petcock itself is leaking, a new one may not solve this, recheck mating surfaces, only cost you time. Try different bolts in case it's the surface under the bolt head may be the issue since you said it was leaking past them.

[Chromedome]

Gas cap

Hi, iv been reading your threads and i sure hope it works, not least because iv been having very similar problims 1980 GS850L and like you when she was stored during bad weather, she was fine. I have a gas cap seal coming across the Atlantic the other way, from U S A to Ireland but id never made the connection, that thats why she could be running bad just knew the seal was bad and havnt got the seal yet to try it. Sure hope it fits. Sorry i cant be of more help. Stephen.

[sedelen]

But I am still getting gas leaking from the bolts.

It's hard to believe all the expense and trouble being tossed about to fix this problem. It could be a bad petcock (cracked at a bolt hole), a bad seal in it, usually underneath the lever, or diaphram if it's leaking at the back. It could be a bad O ring or dirty surface if it's leaking where the petcock mates to the tank. It could be a bad gas line connection to the petcock.
But if it's leaking at the bolts, it's more than likely the self sealing Oil Gallery Exhaust washers. Those are special washers that seal the bolts and if they're bad, cracked, or flattened, they could be prone to leak. Try to understand that
these holes the bolts fit through bypass that O ring seal at the tank/petcock surface. To better understand, simply remove a bolt and watch the gas pour out.
If that is where the gas is coming, that's where I'd focus my attention.
Item 4, part number 09168-06023, $1.16 each at Boulevard Suzuki.

http://www.boulevardsuzuki.com/fiche_section_detail.asp?section=96065&category=Motorcycles&make=SUZUKI&year=1982&fveh=2157

[Soyanarchisto]

My petcock was leaking too and you could see where the PO used silicone to try and seal it. I cleaned all the gunk off and replaced those washers that sedelen points out and my problem was solved.

Good luck!