Easy question

I only ride in the summer and spring here in Illinois what oil do u reccomend and how much thanks

Sorry 1980 kz 750 four

I use 15W - 40 Rottella non synthetic

a KZ 1000 uses 3.7 quarts.......might need a bit more with new filter.

Sorry, not up on 750 usage?

One 4 qt container cost: $ 13.00

Look on the lower part of the right hand side of your engine. You should see a round site glass there. with upper an lower lines marked on it. When you change you oil & filter the oil level should be near the upper line. Near that site glass the case should have the oil quantity cast into it and the filler cap should show the appropriate oil weight. With the filter my KZ650 takes about 3.7 quarts, but use the line to make the amount right.

I use 10w-40, and that is what I would recommend for Illinois. There are a number of good oils, but you need to use oil that had JASO-MA marked on the container. This is very important because other oils may (usually WILL) contain friction modifiers that will ruin your bike's wet clutch. I use Mobil-1 4T Racing oil. It is NOT car oil. Don't use car oil in your bike; use motorcycle oil or Rottella. Ed

koloj wrote: Sorry 1980 kz 750 four

10-40 or 15-40 is OK for warm weather.

650ed wrote: Look on the lower part of the right hand side of your engine. You should see a round site glass there. with upper an lower lines marked on it....

Also, right next to the sight glass (oil level gauge), the capacity is cast into the clutch cover.
It probably says 3.5 L (small cursive L -->> ℓ )(3.5L ~= 3.7 qts).

Here's a site w a manual & wiring diagrams. mbsween.bike-night KZ750L3 page
Scroll down & click "The Bible" link.

Note: some of the wiring diagrams are mislabeled in the links.
The 1981 Ltd is an H2, the 82 is an H3, & the 83 is an H4. search tags mbsween KZ750L3

Yea saw that number 3.7 on side I was just wondering what everyone was using...just like guy out here told me to put little marval mystery oil in my gas each fill up so the gas don't eat the valves and seats little things help from people trials and errors