Rear drum cylinder leak?

JeffreysDart said

I'll check that again but I'm telling you it's dry as can be! More investigation this weekend when I take the wheels off.

Click to expand...

If you are not gonna drive it till then,block the brake pedal down an inch or two. This will close the compensating port and prevent the M/C from going dry;as well as slowing the rear leak to nearly zero.