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The Cruising Gunsmith
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1,459 Posts
Discussion Starter #1
This is ridiculous. I saw a set of new pistons and rings on ebay that it said fit a 750 CSR (which is a 750 twin made in 1982). I wanted to know if they would fit my 1979 KZ750twin.

OK...

I go to Bike bandit and check the stock piston/ring sets for each bike and it says that BOTH models used the:

Piston: 13029-1039
Rings: 13025-059

Great... except the replacement stock pistons I got a while back that do fit my 750T are:

13001-077

I read it right off the box.



the ebay item lists the part number for the pistons they say go into the 750 CSR as 13001-1086. But, the picture of them does not look the same as mine.

Is there any source I can go to that will tell me what fits what?
 

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Riding every day!
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1,063 Posts
I have some cross reference software for Kawasaki bikes; thie numbers you post first MAY be wrong, I would call a dealer to make sure. The software says this.

Piston: 13029-1039 0.50 O/S

Rings: 13025-059 Ring Set, 0.020 O/S

13001-077 Piston: Piston, STD, 13001-1086

What this means is Bike Bandit says their piston is an oversize, and the rings are oversize, but they won't match up.

Your piston purchase is correct with 13001-077, and it is a match to 13001-1086.
But check with a dealer to be sure.

By the way, this software is sold on Ebay, from a fella called Zedder, and it covers all Kawasaki machines from the 60's to the present, ATV's , Watercraft, etc. This guy also has the software for Suzuki and maybe the other two Jap manufacturers. Cost me $25 a few years ago.
 

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The Cruising Gunsmith
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1,459 Posts
Discussion Starter #4
I have some cross reference software for Kawasaki bikes; thie numbers you post first MAY be wrong, I would call a dealer to make sure. The software says this.

Piston: 13029-1039 0.50 O/S

Rings: 13025-059 Ring Set, 0.020 O/S

13001-077 Piston: Piston, STD, 13001-1086

What this means is Bike Bandit says their piston is an oversize, and the rings are oversize, but they won't match up.

Your piston purchase is correct with 13001-077, and it is a match to 13001-1086.
But check with a dealer to be sure.

By the way, this software is sold on Ebay, from a fella called Zedder, and it covers all Kawasaki machines from the 60's to the present, ATV's , Watercraft, etc. This guy also has the software for Suzuki and maybe the other two Jap manufacturers. Cost me $25 a few years ago.

I think that 0.020 oversize rings and 0.50 oversize pistons actually do match up. I believe that "0.50" refers to 0.5 mm which is actually .020".
 

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1,372 Posts
13008-055 RING SET,PISTON 2 STD
[Add to Picklist: 13025-059]
9 13025-059 RING SET,0.020'0.S (2)
[Add to Picklist: 13024-059]
9 13024-059 RING SET,0.040'0.S (2)
[View Supersession]
[Add to Picklist: 13001-1086]
10 13001-1086 PISTON,STD 2 STD
[View Supersession]
[Add to Picklist: 13029-1039]
10 13029-1039 PISTON,0.50 O/S (2)
[View Supersession]
[Add to Picklist: 13027-1038]
10 13027-1038 PISTON,1.00 O/S (2)
 

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The Cruising Gunsmith
Joined
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1,459 Posts
Discussion Starter #6
13008-055 RING SET,PISTON 2 STD
[Add to Picklist: 13025-059]
9 13025-059 RING SET,0.020'0.S (2)
[Add to Picklist: 13024-059]
9 13024-059 RING SET,0.040'0.S (2)
[View Supersession]
[Add to Picklist: 13001-1086]
10 13001-1086 PISTON,STD 2 STD
[View Supersession]
[Add to Picklist: 13029-1039]
10 13029-1039 PISTON,0.50 O/S (2)
[View Supersession]
[Add to Picklist: 13027-1038]
10 13027-1038 PISTON,1.00 O/S (2)


Interesting... what really ahd me scratching my head was that the ebay seller listed both the +0.5 and also the +1.0 piston sets as 13001-1086 which is actually the standard piston.

maybe he means they are the over size pistons that REPLACE the 13001-1086. Anyway, thanks for the info.
 

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The Cruising Gunsmith
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1,459 Posts
Discussion Starter #8
Kawasaki.com has parts diagrams in the Owner Info section. I find it easiest to search by year only without fumbling w VINs or model info. Choose a year only & pick from the list of bikes. The diagram reference numbers are clickable, making it easy to find the full part number located below the pic.

The diagrams have a bunch of info, such as what bikes use the same part
& part supersession
.
(click the yellow question mark or the red S at the Kaw website).

For your bike (1979 750-Twin) after choosing the cylinder/piston diagram, I zoomed in a few times, then clicked on the piston reference number - this chooses & hi-lites the full part numbers for the pistons. Clicking a part number opens a new window which has the
&
- click those icons for additional info.

Clicking
will open a PDF help page which has some detailed info on how to use the Parts interface more effectively. JMK.


Thanks. I did finally find the way to get to the diagrams on that site. I noticed it doesn't even cover most models (like my 1979 KZ-750 B4). All it says for that year is a "LTD" which my bike isn't, but I guess the motor is the same?
 
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