Matchless G2/CS

   

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"