1965 Matchless G12CSR
650 Twin

1965 MATCHLESS G12CSR – A BRIEF HISTORY
Matchless built their first vertical twin in 1949, the 500cc G9. In 1956, they punched it out to 600cc and named it the G12 (seen here). In 1959 they punched it out again to 650cc and called it the G15. In 1963 there were four models offered of the G12. There was the Standard, De Lux, the CS (Competition Sport) and the CSR (Competition Sport, Road). They all were 646cc vertical twins with the 4-speed AMC gear box, Lucas magneto ignition. The CS and CSR came with alloy fenders, siamezed exhaust, and quick detachable headlight. The CS had a small 2-gallon competition fuel tank, skid plate and western style handlebars. An option offered for these bikes was a speed kit that consisted of 10.5:1 compression pistons, hotter camshaft and dual carburetors. These additions proved to over stress an already fragile crankshaft. The AJS version was the Model 31 and they came in AJS Mediterranean Blue.

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1965 Matchless G12CSR SPECIFICATIONS