Z1 Trans cover seals

So my clutch push rod started leaking on saturday... leaking a lot so I couldn't ignore it.

One oil spill later:



And the cover after a light cleaning:



Here's the bad seal:



So the question is, should I replace the countershaft and shifter seals as well? The existing ones are still serviceable and didnt leak at all.

Prevention is better than cure.

Unless you've already replaced them recently I would you're already into it.

That's what I was thinking

if in doubt change them out.

+1 all the above.

Good Ridin'
slmjim & Z1BEBE

Yep, i cleaned the cover, scraped off the old gasket material and I'll head over to the machine shop tomorrow morning to use their press.
A few years ago I was able to grab one of the last Arusu oil seal kits they had.... good to know I finally get to use it:



and because what's a good thread without pictures:

The three seals on the left are for the shift shaft. Two in the sprocket cover and one in the tranny cover.
Steve
www.kzrider.com/forum/2-engine/599659-chain-cover-tranny-seals

A press is way overkill for those seals, they'll tap right in with sockets and small hammer.

True, but the hand press at the shop gets the job done in one smooth, even movement.

All fresh:



The screws on the cover were a bit chewed up, so I'm curious what the previous owner was doing in there 15+ years ago.

The Z1 and Z1A used a sprocket with both sides flat. The Z1B had a shoulder on the inside to move the sprocket out a bit to account for the wider O-ring chain. If you put a Z1/Z1A sprocket on a Z1B without a spacer the chain will rub the ends of the screws and put a groove in front part of your transmission cover. The Z1B also has a spacer behind the rear sprocket to give room for O-ring chain.

Edited to add that I looked at your photo and don't see the usual rub marks.

That's interesting, I never knew that.

I'll say, the cover does have the "normal" grooves on the lower "guard" due to a having a poorly tightened chain at some point in its life.