Gearbox oil leak?

[JohnGS850L]

Bike has been sitting for weeks while I slowly rebuilt the carbs in my spare time (Thanks to Mr. Bar at CycleOrings.com! Excellent product and customer service).

I go to install the carbs and notice she's sprung a leak... If it ain't one thing it's another.

http://imgur.com/ucHqpP0

At first glance this looks to be a failed gasket behind the square piece w/ round center on the gearbox? I tried to find a part number through suzukipartshouse diagrams, but couldn't. Does anybody know? Is there anything more major I should consider other than a gasket?

Thanks as always

[Brendan W]

Have a look at this. There is an o ring in behind the flange. Could be the plug either.

http://www.cmsnl.com/suzuki-gs850g-1981-x-e01-e02-e04-e17-e18-e21-e22-e24-e25-e26-e34-e39_model13500/partslist/FIG-16.html#results

[JohnGS850L]

Ah, that's the part schematic I was looking for. Missed it somehow. Thank Brendan, I'm gonna get the plug and O-ring both. Bike's over 30 years old without much restoration, might as well do it right.

Your profile picture looks like you're rounding a course marker/racing buoy, yeah? Motorcycles and sailboats are a damn good way to get around by land and sea. Something about freedom, etc.

[Brendan W]

Nieupoort, Belgium Laser Radial Worlds. Not me in that pic. Eldest son.
He was in Portland Maine a few years prior to that on an Irish youth team.
We raced a lot together single and double handers.
Must change it to one of me