Matchless G2/CS
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Make Model | Matchless G2 / G2S / G2CS |
Year | 1958 - 62 |
Engine | Single cylinder, 4 stroke |
Capacity | 248.5 cc / 15.2 cub in. |
Bore x Stroke | 69.85 x 64.84 mm |
Cooling System | Air cooled |
Compression Ratio | G2 / G2S: 7.8:1 G2CS: 10.5:1 |
Fuel System | G2 / G2S: Amal monobloc 376/5 carburetor G2CS: Amal monobloc 376/276 carburetor |
Lubrication | Dry sump, external tank |
Engine Oil | Hot: SAE 50 Cold: SAE 30 Extreme cold: SAE 20 |
Oil Capacity | 1.4 L / 3 US pints |
Exhaust | Single |
Starting | Kick |
Clutch | Wet, multi-plate |
Transmission | 4-Speed |
Final Drive | Chain |
Chain Links | G2 / G2S: 123 links G2CS: 131 links |
Internal Gear Ratios | 1st 2.42 / 2nd 1.85 / 3rd 1.30 / 4th 1.0:1 |
Frame | Open, tubular steel frame, closed at the bottom by a pressed-steel channel |
Front Suspension | Telescopic fork |
Rear Suspension | Swinging-arm, with shocks and coil springs |
Front Brakes | Drum |
Rear Brakes | Drum |
Wheels | Steel, wire spokes |
Front Tyre | 3.25 x 17 in. |
Rear Tyre | 3.25 x 17 in. |
Wheelbase | 1345 mm / 53 in. |
Ground Clearance | 140 mm / 5.5 in. |
Seat Height | 760 mm / 30 in. |
Dry Weight | 148 kg / 325 lbs |
Fuel Capacity | 12.5 L / 3.3 US gal |
Colours | Red, Black |
It was in 1958 that Associated Motorcycles announced the AJS Model 14 and Matchless G2, ostensibly a new range of unit construction 4-stroke 250s; the market reacted unenthusiastically. The engine was bulky for the quarter litre class and, on closer examination, still used a separate gearbox, requiring manual adjustment of the primary chain. The fact the chassis employed similar components to the James & Francis Barnett lightweights also drew further adverse comment.
"Tank badge for G2 models"