Piston numbers

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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lasse
Member
Posts: 7
Joined: Wed Oct 12, 2005 10:45 pm
Location: SWEDEN

Piston numbers

Post by lasse »

I have an AJS 58/30 CS.The pistons are the same size but have different stamped numbers,left piston 023504 L6259,right piston 023504 L6299.What is the OD-size? Ithink i have to put in new rings because I have different compression in right and left.The left has 85 PSI and the right has 105 PSI.The barrels are in very good conditions.I hope there is an answer on the problem.
g80csp11
Member
Posts: 1567
Joined: Mon Jan 01, 1990 12:00 am
Location: WEST SUSSEX UK

Re: Piston numbers

Post by g80csp11 »

see link to Hepolite catalogue , it will give compression height , piston length and diameter
I can only see 2 pistons , 7.5:1 and 9.:1 listed from 56-58
not sure this helps , other than to check pistons

cant see 023504 as a piston number anywhere

Spares list

http://archives.jampot.dk/book/Spares_l ... 0_30CS.pdf

piston summary

http://archives.jampot.dk/technical/Pis ... models.pdf

Hepollte catalogue

http://archives.jampot.dk/technical/Pis ... 4-1963.pdf
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