'61 G12 CSR Broken Crankshaft

Information relating to the Matchless G12 or AJS Model 31 650cc twin
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dgurovich
Posts: 8
Joined: Mon Nov 23, 2020 4:48 pm
Location: Michigan USA

'61 G12 CSR Broken Crankshaft

Post by dgurovich »

Well, my '61 CSR crank snapped at the rod journal on the RHS. Took the rod with it obviously, and now I'm facing a teardown.

I have a rather complete workshop, with lots of specialist tools, but no Matchless goodies. For my teardown, what are the tools that I "really, really" should get to make my job easier?

Also, Where is the best place to score a decent late G12 Crankshaft (dynamo) for my bike...
matchless_crank.jpg
Matchless_rod.jpeg
... and, well, I guess I'm gonna need at least one rod, plus a full set of bearings, gaskets, etc. Is there a "kit" that the club sells for rebuilds, or do I have to piece it?
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