What is the Compression Ratio on piston 800312

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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What is the Compression Ratio on piston 800312

Postby Dixter » Sat Dec 19, 2020 5:29 pm

Seasons Greetings: The "Spares Scheme" shows a 500 long stroke piston with the numbers 800312. I'm seeking a replacement piston and desire one with a CR above 8:1.

Who is the manufacturer and their part number on the 800312 piston the 'club' stocks?

Ciao, DC
Dick Casey
The RideNut

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