Technical specifications
|
| Model: |
MAC (post war) |
| Years: |
1946-59 |
|
Production:
|
25 000 units
|
|
Engine:
|
Four stroke, single cylinder, OHV
|
|
Capacity:
|
349 cc / 21.3 cub in
|
|
Bore x Stroke:
|
68.5 x 96 mm
|
|
Compression Ratio:
|
6.75:1 (from 1951)
|
|
Cooling System:
|
Air cooled
|
|
Carburetor:
|
Amal needle-type
|
|
Lubrication:
|
Dry sump
|
|
Exhaust:
|
Single, megaphone chrome silencer
|
|
Ignition:
|
Lucas K2F magneto
|
|
Starting:
|
Kick start
|
|
Max Power:
|
11 kW / 15 hp @ 6300 rpm
|
|
Clutch:
|
Three-plate
|
|
Transmission:
|
4 Speed
|
|
Final Drive:
|
Chain
|
|
Frame:
|
Single top and front down tubes and twin tube cradle
|
|
Wheelbase:
|
1276 mm / 50.25 in.
|
|
Seat height:
|
700 mm / 27.5 in.
|
|
Front Suspension:
|
Pre war: Webb girder style Post war: Air-sprung Dowty Oleomatic forks
|
|
Rear Suspension:
|
Hydraulic shocks
|
|
Front Brakes:
|
7 in., drum
|
|
Rear Brakes:
|
6 in., drum
|
|
Front Wheel:
|
19 in., spokes
|
|
Rear Wheel:
|
19 in., spokes
|
|
Front Tyre:
|
3.25 x 19 in
|
|
Rear Tyre:
|
3.25 x 19 in
|
|
Dry Weight:
|
Pre war: 130 kg / 280 lbs Post war: 161 kg / 355 lbs
|
|
Fuel Capacity:
|
11.4 L / 3 US gal
|
|
Top Speed:
|
121 km/h / 75 mph
|
|
Colours:
|
Black/chrome
|
|
Source:
|
Wikipedia
|