Oil Filter Cover

TexasKZ wrote:

I think the Z/KZ 1015cc engines did not have one. The later J 998cc engines did.

650 and 750/4 bikes all have the cover.  As do the later big Z's...and a multitude of different bikes.  partzilla shows the application data.

Later like 81 on. 
Yes I see it changed in 81 to a non covered pleated filter and that cover. His is a 78 so not needed but he has to order the correct filter.

Cra-z1 wrote:

Later like 81 on. 
Yes I see it changed in 81 to a non covered pleated filter and that cover. His is a 78 so not needed but he has to order the correct filter.

The correct filter, hm! Now the question is, what kind of filter element is available for no- covered/covered filter engines?????

Scirocco wrote:

Cra-z1 wrote:

Later like 81 on. 
Yes I see it changed in 81 to a non covered pleated filter and that cover. His is a 78 so not needed but he has to order the correct filter.

The correct filter, hm! Now the question is, what kind of filter element is available for no- covered/covered filter engines?????

Kawasaki dealer, Partzilla, Webike, CMS, Z1E.

www.z1enterprises.com/oil-filter-kawasak...arly/all-models/1978


www.partzilla.com/product/kawasaki/16099...82dc596f7df671a37e50

Is there a non-caged option?  I had assumed everyone who didn't have the fence were using a non-caged filter without any adverse effects. without the cage. might want to install a fence. 

If by the term cage you mean the perforated metal covering on the filter, then the engines that do not use the fence do use the caged filter, while engines with the fence do not.

So far as I remember, I have never owned a Kawasaki that did not have the fence, so I have no idea if the filters are interchangeable.

K & N :
KN-126 oil filter with perf metal "cage"  73 - 80  Z1 / KZ900 & KZ1000
KN-401 oil filter without perf metal "cage"  KZ1000J & some others

early 900/1000 vs 1000J.  the caged type oil filter is taller and its oil bolt is different and looks longer. the oil filter o.d. is about the same. 

wrote:

I have changed oil and filter some hours ago today. My bike has no cover .  The important thing is like cra-z1  mention is the thin washer .It "glues" to the
filter when taking the old out and is easy to throw away with the old filer. Today the washer did that again and i had to pick it off the old filter and place it on the
oilfilterbolt again before installing new filter. If you install new filter without the washer you risk that the spring push the rubberseal on filter in so you got NO filtration .

 

   Those are same basic design as Mama Kaw's OEM# 16099-001 oil filter for 73 - 80  Z1 / KZ900 & KZ1000.  They're examples of the perforated sheet metal that covers the outside (and inside) of the paper filter element.  Shine light into the inside of  one & that perforated cage will be seen.
   A consideration we look for in aftemarket filters is the number & size of holes or, put another way, the total open surface area to expose the filter element to oil flow.  The Z-motors in question have ball & roller bearings that bear the heaviest loads; those bearings live by flow volume far more so than pressure.  The high-volume 3~5 PSI (hot) pressure of a Z motor is fine for balls & rollers as long as volume is maintained.  The solid cam bushings are so lightly loaded they just need a constant oil film in a stock motor to live.
   We ve seen aftemarket 16099-001 "equivalent" filters that have so few holes / insufficient open surface area that we question their ability to flow adequate volume, whatever that might be.  Mama Kaw never spec'd volume that we know of, only pressure.  There are aftermarket filters that have some fewer holes, but they are clearly much larger than others that have more, smaller holes.  Surface area open to the filter is what counts.  There's probably a way to calculate open area based on hole size & count but, we're not going there.  Eyeball evaluation is all we do.
   We toss any aftermarket filters we get in parts lots that clearly have the too little open area / too few holes syndrome compared to an OEM or quality aftermarket filter, so we don't have any to photograph.  We don't sell them at swap meets, as we don't want to contribute to the possible demise of someone's motor.
   The filters in OP's and Rolf1976_KZ900 posts above appear perfectly fine in that regard & should be able to flow plenty of volume.

Good Ridin'
slmjim & Z1BEBE

Good Ridin'
slmjim & Z1BEBE

Comparison:
K & N  KN-126 filter on the left, chinese no-name filter on the right.   

^^^ Both of those have plenty of flow area.^^^

If you examine the inner cage where the filter bolt lives, you'll see the same generous configuration of holes in the sheet metal.

Wish now we'd kept an example of an aftermarket filter that has too few holes / too little flow area.  It's pretty obvious in comparison.

Good Ridin'
slmjim & Z1BEBE

I'm gonna stick with the K & N, even though the engineer in me guesses the open area is similar on both.