BSA - C12 56-58

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Bike Info

CC:
249
C12 Parts and accessories

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