1980 kz750 twin fork oil capacity

You're simply wrong - see examples below. Show me a Kawasaki manual that does NOT say measure with the front wheel off the ground. - I'll wait for it. Do your own research and get back to me.

Here you go, straight from the Kawasaki service manual for the 2000 zx6r, page 12-4 "Fork Oil Level Fully compressed, without fork spring, below from inner tube top 113 +/-2 mm (4.45 +/- 0.08 in.)"


I suspect that Kawasaki now specs fork oil level this way because it is more accurate (+/- 2mm ).




But don't give me that old "I know a guy who knew a guy who had an uncle who went to races and a guy there told him he once talked to a tuner who knew a guy......" Show me the printed words from the manufacturer that gives the specifications for the 1980 KZ750 twin. :laugh: :laugh: :laugh: Ed

Again, here you go.

racetech.com/ProductSearch/2/Kawasaki/KZ750/1980

You may be resistant to the latest information and techniques for servicing motorcycles, but I am not.
Don’t get all nasty about this, doing so will only make you look stupid.

You are still simply wrong. Call me stupid if you like, it doesn't bother me as I've been called worse, but you are not offering any help to the original poster.

Your link discusses emulators, not stock KZ750 forks, and gives information for those that is no way related to the oil level for stock Z750 forks. It states "Oil Level Tuning Range is 100-180mm in general." Not only is that a HUGE range, it also is not at all specific to the KZ750 and is far too vague to be useful.

Regarding the info you provided for the 2000 zx6r forks. Have you ever seen those forks? If so, you may have observed that they are upside down forks which is a completely different configuration than that of a KZ750 (see image below). Trying to equate those forks to 1980 KZ750 doesn't help answer the question.

While the info you provided may be of interest to someone running Racetech suspension components or to the owner of a 2000 zx6r, it is totally irrelevant for anyone trying to work on stock 1980 KZ750 forks. Neither provides any specs for the KZ750 forks and neither provide the CORRECT procedure for measuring the fork oil level for KZ forks, so they are no help in answering the question he asked. Considering the fact that the KZ750 specs will be based on measuring with the forks fully extended you must understand that using that spec to measure the oil level with the fork fully compressed instead of fully extended will result in the oil level being very wrong. The fork oil level for the 1980 KZ750 MUST be measured and adjusted with the front wheel off the ground. Kawasaki does not provide a fork oil level spec for that bike that would be at all accurate if the front forks were fully compressed. Ed

No, if you take the time to actually look at the Race-Tech page that I posted a link to you will clearly see that the "Recommended Oil Level " is "140mm ".
I see nothing about "Oil Level Tuning Range is 100-180mm". on that page.

No, the stock forks on a 2000 ZX6r J1 are conventional " right side up forks" The most accurate technique for measuring fork oil level in either type of fork is "Fully compressed, without fork spring, below from inner tube top ".

The photo you posted is of a later model 2003-2004 ZX636, If you look you can see 636 in the photo.

You are just too sharp for me!

I didn't see that. Obviously you are correct. So over the past decades all the KZ Kawasaki Service Manuals got it wrong and now the correct way to measure the fork oil is to bottom out the suspension (since the springs won't prevent the internals from clashing into each other with the top bolts removed) and then measure the fork oil level. You may want to have Kawasaki send out messages and apologies to the hundreds of thousands of KZ owners telling them that they have been doing it all wrong for the past 30 - 40 years because RaceTech says so. :laugh: :laugh: :laugh:

As for me, I'll keep doing it the way the manual describes the process and the way that has worked perfectly for me for the past 37 years, even though Race Tech knows better, and I will continue to recommend that others do the same. Ed

I'm sure Kawasaki will send out an an apologie for the fork oil level the same time they send out an apologie for the bad torque values they published for the cam bearing caps on the Z-1's and KZ1000's.

I gotta say, I'm with 80B4 on this. I've had forks done by Race Tech for my street bikes (89 GSXR1100 RWU forks) and Davey Durelle for my flattrack bikes (early R6 RWU forks), and both those guys recommend springs out and fully compressed to measure fork oil level. Just my 2p worth. Paul

That's fine, but who's specs are you using when doing a KZ? Personally, I will go with the KZ fork oil specs since they have worked great for me and didn't require me to put in aftermarket parts to achieve good results. But to each his own. Ed

"The best you've ridden is the best you know!" - Paul Thede

WTF??? 5.7 TO 6 OUNCES!
DONE!

Hello-Here is what I do-per the manual,first jack the front of the bike up so the front wheel is off the ground-next get a wooden dowel a half inch diameter by 2 feet long-take the caps off and pour a little bit in each tube and drop the rod in to check the level-you want the rod to bottom out in the tube-you want 3 inches showing (wet)on the bottom of the rod-pour a LITTLE at a time,this has worked for me over the years-I also cut a groove in mine to mark it-Have fun .