HI all,
I own a 1963 AJS CSR and am after some piston rings. The size of the pistons fitted have a size stamped on their crowns as 72.5, which I assume is a metric size? What is this in real money? Can anyone suggest an outlet where I can buy sets or individual rings?
Thanks in advance
Jim
1963 CSR piston rings
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- dave16mct
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1963 CSR piston rings
Depends what make of piston. They sound like the Italian ones sold by JSL. If Hepolite try Thorntons, Shrewsbury.
- bjork
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1963 CSR piston rings
Yes that is a metric measurement.
Try www.coxnturner.co.uk or ring 01425 652627 or 01935 826816.
They will ask you for the bore diameter, ring width and depth and the depth of the ring grooves in the piston.
There is also Thorntons at Shrewsbury. I've used them both and found both helpful and quick for out of stock piston rings.
I think the bore size is 72mm as standard (from memory=not as reliable as a workshop manual) so a 72.5mm is the first oversize (approx 0.020" in old money)
Edited by - bjork on 08 Sep 2011 11:38:36 PMEdited by - bjork on 10 Sep 2011 6:08:48 PM
Try www.coxnturner.co.uk or ring 01425 652627 or 01935 826816.
They will ask you for the bore diameter, ring width and depth and the depth of the ring grooves in the piston.
There is also Thorntons at Shrewsbury. I've used them both and found both helpful and quick for out of stock piston rings.
I think the bore size is 72mm as standard (from memory=not as reliable as a workshop manual) so a 72.5mm is the first oversize (approx 0.020" in old money)
Edited by - bjork on 08 Sep 2011 11:38:36 PMEdited by - bjork on 10 Sep 2011 6:08:48 PM
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- Rob Harknett
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1963 CSR piston rings
When my 63 CSR was rebuilt, new rings were fitted as a precautionary measure by John Bolton at Kettering. Don't know what the rings were but the bike nipped up on a test run and he had to put the original rings back in.