piston ring I.D. for Aero125

Aero 125, Elite 125, Elite 150, SH150i, Elite 250, Helix, Big Ruckus, Reflex, Silverwing and PCX 125 / 150, Forza
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utahusker
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piston ring I.D. for Aero125

Post by utahusker »

Hello,

I received a set of NOS rings, and they have no 1t or 2t markings to distinguish the first or second ring, per service manual. One of the rings has an "R" marked on it.

Is there any way to tell which ring goes where?

tia

James
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flybd5_juan
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Re: piston ring I.D. for Aero125

Post by flybd5_juan »

A black hole marks the spot <insert imaginary deity here> divided by zero.
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Re: piston ring I.D. for Aero125

Post by utahusker »

Mine doesn’t have the 1T or 2t markings, one has an r on it and the other has none.
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Re: piston ring I.D. for Aero125

Post by utahusker »

Problem solved, someone from another forum stated the r ring is bottom.
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Re: piston ring I.D. for Aero125

Post by flybd5_juan »

utahusker wrote: Sat Apr 25, 2020 2:03 pm Mine doesn’t have the 1T or 2t markings, one has an r on it and the other has none.
If they don't have the 1T and 2T then they are not NOS.
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Re: piston ring I.D. for Aero125

Post by utahusker »

I think they are NOS, but may be for the Lead. They definitely helped the “bogging” issue. Runs very well now.
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Re: piston ring I.D. for Aero125

Post by utahusker »

46B232E2-6283-4C0B-A027-31DCE8D16E0B.jpeg
46B232E2-6283-4C0B-A027-31DCE8D16E0B.jpeg (150.05 KiB) Viewed 2666 times
They measured to spec from the manual.
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Re: piston ring I.D. for Aero125

Post by flybd5_juan »

That doesn't really prove they are NOS. Boxes can be reused. I have seen this before.
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Re: piston ring I.D. for Aero125

Post by utahusker »

Okay

Although someone answered on the Aero Facebook page immediately, and stated the R was the second ring.
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Re: piston ring I.D. for Aero125

Post by flybd5_juan »

The letter R just means that that that particular ring is installed with the R towards the top of the piston, not that it goes into any particular place on the piston. The rings should not be exactly the same, one is a keystone ring and the other should be a square ring. The keystone ring goes on the top, the square ring on the bottom. The manual makes this clear.
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