Piston Ring confusion

I picked up a set of rings off of ebay from 3 different buyers. Each buyer claimed the rings were for a KZ750LTD 4 cylinder. I have been told (and I think I have verified) that the rings are the same for all 4 years of production (80 to 83). I *believe* the kawasaki part number is 13008 and each auction had a picture of the package showing the part number on it.

So, fast forward 2 months and I am finally getting around to putting the rings on the pistons. Big surprise, 3 out of the 4 sets don't fit. The part numbers on the boxes for the sets that don't fit are 13008-0009A (Teikoku piston ring co, all rings are too small) and 13008-5018 std (Nippon piston ring co, oil rings too small and second ring doesn't have groove).

Does anyone have any additional info on this? Does the number after the dash mean something other than when it was produced?

I'm kind of bummed, I think I may be out $120 bucks

Thanks
Jason

Is it possible you have oversized pistons?

Probably say something like "+0.50" on top of them.

There's no markings on the tops of the pistons except for the exhaust arrow. I'll measure them tomorrow when I get time to head back out

OK so u bought rings for 4 pistons from 3 separate buyers, and one of the ring set for one piston doesnt fit, correct ??? bad move, buy em all in a set, BUT, contact the seller and see if u can do an exchange for the one set, it shouldnt be 120 for rings for one piston

jonnybravo wrote: OK so u bought rings for 4 pistons from 3 separate buyers, and one of the ring set for one piston doesnt fit, correct ??? bad move, buy em all in a set, BUT, contact the seller and see if u can do an exchange for the one set, it shouldnt be 120 for rings for one piston

I think you have it backwards 3 sets do not fit and it was 120 for all four sets combined

jason8887 wrote: I picked up a set of rings off of ebay from 3 different buyers. Each buyer claimed the rings were for a KZ750LTD 4 cylinder. I have been told (and I think I have verified) that the rings are the same for all 4 years of production (80 to 83). I *believe* the kawasaki part number is 13008 and each auction had a picture of the package showing the part number on it.

So, fast forward 2 months and I am finally getting around to putting the rings on the pistons. Big surprise, 3 out of the 4 sets don't fit. The part numbers on the boxes for the sets that don't fit are 13008-0009A (Teikoku piston ring co, all rings are too small) and 13008-5018 std (Nippon piston ring co, oil rings too small and second ring doesn't have groove).

Does anyone have any additional info on this? Does the number after the dash mean something other than when it was produced?

I'm kind of bummed, I think I may be out $120 bucks

Thanks
Jason

Kawasaki part #'s are more than just the first 5 digits. The correct part # for the Kz750 4 cylinder standard ring set is 13008-5031 per the Kawasaki Part's Diagram page.

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