Mk3 Commando Rear Master Cylinder Piston (13mm)

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Mentioned elsewhere, but best tried here...
I have Andover Norton supplied 13mm rear master cylinder that was heated to dismantle. Sadly this b*ggered the plastic piston, which are NOT available from AN in 13mm size.. Have been told the cylinder is also shared by 'Late Triumphs', but no specific model.. Any help/offers appreciated please. Piston is visually as the OE shown on the AN website (06.7247RK), though obviously slightly slimmer :)
Thanks in advance...
 

L.A.B.

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Piston is visually as the OE shown on the AN website (06.7247RK),
This is not making much sense (not your fault I hasten to add).

06.7247 is the 13mm master cylinder...
https://andover-norton.co.uk/en/shop-details/16969/rear-master-cylinder-assy-13mm-bore-

....06.7247RK (repair kit?) therefore seems to be for the 06.7247 master cylinder?
https://andover-norton.co.uk/en/shop-details/16970

Have been told the cylinder is also shared by 'Late Triumphs', but no specific model..
Yes, but standard 5/8" piston size.....

99.7027
https://andover-norton.co.uk/en/shop-details/21199

..... which uses the 5/8" piston.
https://andover-norton.co.uk/en/shop-details/18142
 
Last edited:
Joined
Mar 7, 2020
Messages
949
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This is not making much sense (not your fault I hasten to add).

06.7247 is the 13mm master cylinder...
https://andover-norton.co.uk/en/shop-details/16969/rear-master-cylinder-assy-13mm-bore-

....06.7247RK (repair kit?) therefore seems to be for the 06.7247 master cylinder?




Yes, but standard 5/8" piston size.....

99.7027
https://andover-norton.co.uk/en/shop-details/21199

..... which uses the 5/8" piston.
https://andover-norton.co.uk/en/shop-details/18142
Many thanks for taking the time and trouble to post such a comprehensive reply.. I was told by Ashley at Andover that the 06.7247RK kit was not for the 13mm cylinder. On closer look the photo shown does appear to have only one variation to mine in that the rear stepped ridge is further back, though the relationship between the seal positions seems to be similar..
I have been in touch with Triumph vendors offering 13mm cylinders on ebay, but no replies..
Again, many thanks... CBC
 
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