82 KZ750 ltd Oil in Starter coil housing.

Ive just bought my first bike. an 82 750 ltd.

She runs but has a few issues. (oil leaks and electrical).

The leak that i am most concerned about is in the starter coil housing.

there is also a small hole in the bottom of the housing which i cannot find any information about.

Where could the oil be coming from other than the seam in the crank case (the screws holding the starter coil in were striped out by its previous owner so i haven't been able to get a close look yet.)
And is the hole supposed to be there or a common mod for this bike?

Im looking for advice as i tackle this project.

also how hard would it be to replace the entire wiring harness?

Do you mean the stator (ie, alternator)? Is this a Twin or a 4-cylinder?

Edit: there was no photo at the time.

this is an inline 4.

i'm fairly certain that it is the starter coil and not the stator(i replaced the stator wiring already).

(its on the right side of the bike.)

(maybe its the ignition coil? im still shaky on terminology )

Actually, that is your signal generator. it sends firing information to your igniter, which in turn tells the coils when to fire.
There should not be any oil there. A seal is behind there, on the crankshaft, to keep the oil in the engine and not on the signal generator.

I think I understand the confusion over the name. The timing gizmo under that cover is called a "Pulsing Coil" in the Kawasaki.com diagrams.

There is a seal in the case where the end of the crankshaft pokes through. If that seal leaks oil can come through. However, that is not the only potential source of an oil leak there. Under the timing mechanism is the oil pressure switch. It can allow oil to leak if it is damaged or if the threads are not sealed where it is mounted in the case.

The little hole near the bottom of the case is normal. That is intended to prevent oil from building up in that section of the case since that would kill the bike's ignition. Ed

thanks that is helpfull.

i picked up the replacement bolts for the striped ones.
from what i can see i don't think the leak is from the crankshaft it seemed to be coming from lower.

if it is indeed the oil pressure switch, how complex of a fix is that?

Before you go any farther, you should buy a factory service manual.

Replacing the oil pressure switch is not difficult, and NOS units can be bought for about $40, but it requires removing the ignition timing stuff so you can get to it. So as guitargeek pointed out you really should get the Kawasaki Service Manual (not Clymer or Haynes) before going any further. The manuals are usually available on eBay, but be sure to get one that covers your bike's exact year/model. If you find that the switch is the source of the leak and you need to replace it post something on this site and we can help you find a new old stock one. Ed

The oil pressure switch should be easy. The tightening torque is 11.0-ft/lbs. I would use a high temp thread sealant. The switch itself could be leaking, so you may have to replace it. Hopefully, the po didn't mess w it & ruin the threads.

Here's a site w a manual & wiring diagrams. mbsween.bike-night KZ750L3 page
Scroll down & click "The Bible" link. Some of the wiring diagrams are mislabeled in the links. An H2 is a 1981 model, the H3 is an 82, & the H4 is an 83. search tags mbsween KZ750L3

No sealant needed , it's a pipe thread.

Thanks. I checked the electrical connection last Spring, but I have never removed the pressure switch. The manual doesn't say anything about using a thread sealant, so I've been wondering about that. I would still use a thread sealant, not gobs, though.