Tachometer oil leak

What is typical the reson for a small oil leak from the Tachometer gear?
I replaced all gaskets and o-rings 2 season ago, I changed the routing of the tacho cable in the off season maybe the little exstra upwards tenstion have made it?

I will try to avoid taking of the top cover...

My understaind its 3 parts keeping it oil tight?
Is it random with of them need to be replaced? I can change 2 and 3 first then.... ?

1. RING-O,10MM (inside the engine)
2. OIL SEAL (outside the engine)
3. GASKET,TACHOMETER GER (outside the engine)

www.partzilla.com/catalog/kawasaki/motor...der-head-cover-80-h1

Maybe the tach gear rod has some abrasive Points/Areas a seal can´t no longer handle.

Scirocco wrote: Maybe the tach gear rod has some abrasive Points/Areas a seal can´t no longer handle.

Good point, so maybe I have "used up" the seal?
Its`s not possible to take out the gear without taking of the top cover?

Its the oil seal item 8, who prevent the oil from coming out ?
www.partzilla.com/catalog/kawasaki/motor...der-head-cover-80-h1

I could try to replace the oil seal item 8 and see what happens, and if it comes back then open up the top in the off season and take a look on the gear shaft...

I had to made a new high cabon stainless steal clutch push rod where the seal lip bite a groove into the stock aluminum rod.

Cool

I just need a temp. fix working for the season and then make some thinking permanent in the winter
So its the oil seal who stopping the oil?

Did you replace the small oil seal that presses into the tach gear housing? And are there any grooves cut into the tach drive gear which could affect the seal?

Yes replaced it two years ago, have ordered new now. Hopefully will work to end of the season

Will go over it completly in the off season

OK, I'm confused. Do you have to take the valve cover off to get the tachometer gear holder out? Doesn't it just pull out if you remove the retainer screw and retainer? Unless I am missing something this should be no big deal to get the gear holder and gear out.

Rick H.

Rick H. wrote: OK, I'm confused. Do you have to take the valve cover off to get the tachometer gear holder out? Doesn't it just pull out if you remove the retainer screw and retainer? Unless I am missing something this should be no big deal to get the gear holder and gear out.

Rick H.

Thank you !

I dident know, have had it out one time only when I rebuild the engine so have forgotten...

I will then take out the gear and study it to determine where the oil coming from!

Thank you

The tach gear shaft tends to corrode and/or wear right where the seat contacts. Mine is that way and a lot of the used gears on ebay are too. I was going to replace it with a new one but they are pretty expensive and I couldn't stomach the price. Fingers crossed...no leaks yet! When it does, I'll spring for a new gear.

We're not familiar with Z750 motors, so this might not work:
Consider the tach drive housing on a Z1. The oil seal presses into a bore that is about twice as deep than the seal is wide. When Mama Kaw installed the seal, it was sometimes pressed all the way to the bottom of the bore, sometimes not.
Over time, the lip of the seal might wear a groove into the tach drive gear's shaft, although usually it just polishes a tiny width that can't be felt with a fingernail. The gear is hardened.
When we replace a tach drive oil seal, we always evaluate the condition of the tach gear shaft. If there's any question as to the condition of the shaft where the seal lip makes contact, we press the new seal into a slightly different depth. Doing so will present a fresh surface of the tach drive gear's shaft to the lip of the seal. Doesn't take much; 1mm change in depth will be plenty to get a fresh shaft surface running in the seal.

Good Ridin'
slmjim & Z1BEBE

By gordone: .... I changed the routing of the tacho cable in the off season maybe the little extra upwards tension have made it?

Since it's leaking, I would reroute the tach cable so that there's no tension, upwards or otherwise.