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Old 04-20-2015, 06:29 PM   #1
redgum78 OP
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Help from the Honda XL500 experts

Hi Guys,

I need some help identifying a piston.

Some time ago I picked up a rough but cheap 80/81 XL500S.

A few days ago I decided to give it a freshen up. I fitted new clutch plates and a new kick starter spring (old one had broken). I have got the bottom end all back together.
While it was out of the bike I thought I would put a set of rings in it as it is a smoky.

The Bore is 89.6mm and the piston has 0.50 stamped on the top. Cast into the underside of the piston are the letters "ART" and the number "2".

As it is an oversized piston I need to know if it is a Honda one or some other brand. No point getting oversize Honda rings if they don't suit the piston.

Does anyone know what the ART means?

Thanks
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Old 04-20-2015, 08:00 PM   #2
redgum78 OP
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So not a honda piston. Thanks Gator.
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Old 04-21-2015, 08:43 AM   #3
redprimo
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Have you checked the rings to be sure they are worn past spec?
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Old 04-22-2015, 01:52 PM   #4
XRGRIFF
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Art

Thought they made OEM pistons for most of the Japanese factories, even Honda.
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Old 04-23-2015, 05:33 AM   #5
brucifer
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Every stock Honda piston I have seen--at least the old thumper pistons-- has ART cast into it.
The piston you have is a half mm oversize factory Honda piston.
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Old 04-23-2015, 06:50 AM   #6
The Ice Man
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