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TOPIC: Aftermarket piston rings

Aftermarket piston rings 11 months 2 weeks ago #21755

  • Bucko
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tackelhappy wrote: ...Several months after installing the kit I did a leak-down test on the cylinders. I put 100 psi of air into each, and only number 5 was losing about 2 psi into the crankcase- indicating leakage past the rings on that cylinder....


Leak down doesn't necessarily indicate a ring leak - could be a valve sealing issue.
Hello from Canada's We(s)t coast.
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Aftermarket piston rings 11 months 2 weeks ago #21758

  • StanG
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As I mentioned above, it's also relevant to how you use the bike. Do you like quick acceleration to the red line, or cruising at 3-4 k rpm's all day long? It's all relevant and needs a perspective. The wear might look similar when tested, but certain components at mediocre would fail in an engine taken to the max with extreme performance components, while perhaps showing similar degree of wear when tested at a certain point. I guess I am pushing the academic angle here, but it's true.
1982 Kawasaki KZ1300 A4
1981 Kawasaki KZ1300 A3
assembling engine, chassis & electrical from 79 - 89 parts

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Aftermarket piston rings 11 months 2 weeks ago #21764

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StanG - I agree the beveled chrome is probably the best (safest) bet for general use. After all that is what the OEM picked. But non-beveled or non-chrome is probably fine - just don't expect them to have the exact same performance or longevity.

I have two bikes and am thinking about doing a supercharger on one. At that point, I'd go with the forged Wiseco pistons with the 0.8mm rings...

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Aftermarket piston rings 11 months 2 weeks ago #21765

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StanG - I agree the beveled chrome is probably the best (safest) bet for general use. After all that is what the OEM picked. But non-beveled or non-chrome is probably fine - just don't expect them to have the exact same performance or longevity.


I agree, that was my final take on this.
1982 Kawasaki KZ1300 A4
1981 Kawasaki KZ1300 A3
assembling engine, chassis & electrical from 79 - 89 parts

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Aftermarket piston rings 11 months 2 weeks ago #21768

  • McBoney
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Hmm, I think if it is worth doing, it is worth doing properly.

Having just spent a couple of hundred quid on two new engine chains I'd be crazy to skinflint on the piston rings!

I'm gonna ditch the Cruzinimage ones and buy the ones Stan bought - silver lining: they're in the UK, so less postage for me.

Paul
Six-Pot-Cafe in the making...

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Aftermarket piston rings 11 months 2 weeks ago #21769

  • StanG
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Paul, another option. If I can remember correctly, at least local Kawasaki in Canada has OEM ring sets. I didn't got for them simply because the other were cheaper, but not by much at the end. Looking back, I'd probably be buying original Kawasaki rings. I will call them and ask how much are they, and let you know.
1982 Kawasaki KZ1300 A4
1981 Kawasaki KZ1300 A3
assembling engine, chassis & electrical from 79 - 89 parts

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