combat wombat oil leak

[tweagel]

first posting to the group - I have restored a 1973 Combat Wombat, almost complete, but I have a small oil leak coming out of the shifting shaft and shifting rod. I saw in the engine schematic an oil seal, can't tell if it is internal or can it be replaced behind the shift rod?
I restore older Japanese motorcycles - I have a 67 bridgestone trail 100, 71 Suzuki TS185, 67 Honda CM91, 65 Honda Dream 300 & do alot of trail riding here in Colorado. I would appreciate any help.
tweagel

[olddogs]

Good news and bad news. First make sure its not leaking from the countershaft sprocket. The sprocket fits flat against a collar than can hold some oil and cause a drip when the bike is leaning on its kickstand. A loose sprocket would be the good news.

If necessary the O ring on the control shaft can be changed without splitting the cases, but not without a little work. It is done from behind the primary gear on the clutch side by removing a c clip and pulling the shaft through the engine. Since the ball receiver and spring will need to be fished out its a good time to replace these parts. A special tool that's available makes the job easier. There is a step by step outline posted somewhere that guides you through the process. Maybe someone else can tell you where to locate it.

[olddogs]

Forgot to mention that the seal around the collar that the CS sprocket snugs up to can be replaced by just removing the sprocket. It can be pried out and replaced with little effort. It is a common seal size and available on this site. Watch for a grove worn into the collar. This is a common problem on a used Hodaka.