Propeller Shaft

 Call it a drive shaft or as Kawasaki calls it a propeller shaft, according to Kawasaki, it's not serviceable and all you can do is replace it Well, it has a universal joint which measures 63mm outside bearing cup to bearing cup and the bearing cups are 25mm in diameter. The universal joint installs just like a universal joint on a car, so it's a no brainer to remove and replace or one could pop off a bearing cap and grease as a routine, which is what I did.
My original thought was to drill and tap the bearing cup for a grease fitting but these bearing cups are hardened steel and not able to drill, so I opted to just regrease the joint. I removed a circlip and drove out the bearing cup, then using a rubber tipped grease fitting on my grease gun. Pumped in a few strokes of grease until new grease showed up at the other 3 cups. Easy peasy. Installed the 4th cup and circlip and then serviced the outboard end as per the service manual.

 
Photo of the bearing cup with the Koyo part # KC1517ND. 25mm bearing cups and 63mm outside measurement. There are a lot of suppliers with 25 x 63.8mm uni joints and only an Alibaba listing for the 25 x 63mm as far as I've looked on the internet. I don't need a joint right now so I'm just posting my findings for future reference.

 
This photo shows the cross drilling of the cross, so it was easy to grease all 4 cups by just popping off one bearing cup.

 
Each bearing cup has a lip seal ( interesting) I used the grease gun and pumped the cross then added some grease to the last cup and tried to install. Too much grease in the last cup and it was  hydro locked when trying to install. I had to remove some of the grease in order to seat the bearing cup.

 
I found this rubber tipped grease gun fitting at Canadian Tire for $4.99 and fitted it on the grease gun. Worked a treat.