Spec Sheet
The information below is specific to the BSA - C12 56-58, showing anything for service information to the amount of fork oil or even the tyre pressures. If you would like to contribute any missing information, please use the edit link below.
Back.Bike Info
CC:
249
Service
Chain Freeplay mm:
2 1/8"
Engine Oil Grade SAE:
40/50
Engine Oil quantity (litres):
2 1/4
Fork oil grade:
S.A.E 20
Front Fork Oil cc (left leg):
142cc
Front Fork Oil cc (right leg):
142cc
Gearbox Oil grade:
S.A.E 50
Points Gap mm:
0.015"
Spark Plugs Gap (mm):
-018" to -020"
Tyre Pressure Back Bar / psi:
26
Tyre Pressure Front Bar / psi:
18
Brakes
Front:
Drum
Rear:
Drum
Front Drum Size:
7" Diameter - 1 1/8" wide
Rear Drum Size:
5 1/2"Diameter -1" wide
Dimensions
Fuel Capacity:
2 3/4 galls
Ground Clearance:
4"
Height:
40"
Length:
82"
Seat Height:
29 1/2"
Wheelbase:
54"
Width:
26 1/2"
Electrics
Voltage:
6v
Battery:
Lead Acid
Bulb-Headlight:
Lucas No.312 30/24w
Charging System:
Alternator
Ignition:
Lucas Points
Ignition Timing:
34* before T.D.C
Spark Plugs:
L10S
Engine
Type:
Air Cooled 4 Stroke OHV Straight Single
Bore x Stroke:
63 x 88mm
Carburation:
Amal
Compression Ratio:
6.5 - 1
Displacement:
249cc
Transmission
Clutch Type:
WET
Final Drive:
Chain
Gearchange Pattern:
1 up 3 down
Gear Ratio 1st:
16-15
Gear Ratio 2nd:
11-1
Gear Ratio 3rd:
7-64
Gear Ratio 4th:
6-26
Sprocket front:
19
Sprocket rear:
47
Transmission:
Chain
Misc.
Place of Manufacture:
Small Heath, Birmingham, UK
Swing Arm:
YES
Power
Fuel Consumption:
75 MPG
Max Power Output:
11 HP
Top Speed:
65
Suspension
Front:
Telescopic Forks
Front Travel:
4"
Rear:
Girling Shocks
Rear Travel:
2"
Tyres
Front:
WM1-19
Rear:
3-00-19
Add information to the model
All information presented on the website is given to the best of our knowledge at the given time. All information is intended to only as a guide. A major Japanese manufacturer's quote:
We reserve the right to vary our specification with or without notice, and as such time and in such manner as we think fit.