Matchless 600 Twin Pistons and rings??

Information relating to the Matchless G11 or AJS Model 30 600cc twin
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g11csr
Posts: 3
Joined: Tue Sep 01, 2009 3:39 pm
Location: Antrim UK

Matchless 600 Twin Pistons and rings??

Post by g11csr »

I am restoring a 1958 Matchless G11CSR 600 Twin.I have original wire wound piston without rings. I bought rings from Jampot spares but have now heard that they may not fit my pistons. They are GPM rings. Is this true? Why is this? and will i need to buy new pistons? The rings fit and look ok except the chrome plated top ring is not marked top...should it be as the oil ring is marked top.

Thanks for any help.
wilko
Posts: 2337
Joined: Wed Oct 12, 2005 10:45 pm
Location: victoria AUSTRALIA

Matchless 600 Twin Pistons and rings??

Post by wilko »

If there is no visible chamfer or bevel inside or outside it shouldn't matter.
burrage
Deceased
Posts: 88
Joined: Mon Jan 01, 1996 12:00 am
Location: WARWICKSHIRE UK

Matchless 600 Twin Pistons and rings??

Post by burrage »

I understand that the rings available from Jampot Spares are for the pistons they are currently selling, and these have either deeper or wider grooves than the original AMC pistons. You must check that the rings you have will fit in the piston grooves, so that they will go flush with the piston surface.
moley
Member
Posts: 559
Joined: Sat Jan 01, 2000 12:00 am
Location: EAST SUSSEX UK

Matchless 600 Twin Pistons and rings??

Post by moley »

i had the same problem funny enough with a 58 g11csr that i am currently restoring. i went to turner and cox and they had a set only about a month ago phone John on 01425 652627 ..excellent service
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