1963 Matchless G12CS
1963 MATCHLESS G12CS – A BRIEF HISTORY
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.
PROUD OWNER OF THIS 1963 MATCHLESS G12CS
Special thanks goes out to Mark Grover of Brightwood OR who owns this lovely machine, took these fantastic pictures for us all to enjoy. Great job too. Thank you Mark.
WHERE’S YOUR BIKE?
We invite you to submit pictures and written word on your bike. If it’s something we can use, we’ll build a page around it, just like this. Think of the bragging rights. Hope to see your bike here soon.
1963 Matchless G12CS SPECIFICATIONS
Model Designations, Matchless/AJS Engine type Displacement Bore & Stroke Compression ratio Lubrication Oil capacity Fuel system Ignition System Power output Battery Primary drive Clutch Gearbox Final drive Suspension, front Suspension, rear Brakes, front Brakes, rear Frame type Tire, front Tire, rear Dry weight Fuel capacity Fuel economy Top speed |
G12 / Model 31 Air-cooled OHV vertical twin 646cc / 39.4 ci 72mm X 79.3mm 7.5:1 Dry sump 2.5 L / 5.3 US pints 1 – Amal 389 1-1/8″ Lucas distributor & points 35 hp @ 6,500 rpm Lucas 6V 12aH 1/2″ X 5/16″ single chain Multi-plate, wet 4-speed, right-foot shift 5/8″ X 3/8″ chain, 96 links AMC Teledraulic forks Swing arm w/2 shocks 7 -n SLS drum 7-in SLS drum Double cradle 3.25″ X 19″ Dunlop 3.50″ X 19″ Dunlop 396 lbs / 180 kg 4.5 US gal / 17 L 55 mpg / 23.4 km/L 95 mph |
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