Technical Data - BSA Bantam Supreme D14/4 Instruction Manual

Engine Number—on top of crankcase below cylinder.
Frame Number—at top of steering head tube.
Engine:
Capacity . .
Cylinder bore
Stroke . .
Compression ratio . .
Piston ring gap
Sparking plug
Plug points gap
Contact breaker points gap
Ignition timing (fixed)
Transmission:
Gear ratios . .
Clutch—friction plates
Chain size and pitch
front ⅜ × ·250 in.
rear ½ × ·335 in. roller
Teeth on: engine sprocket
gearbox sprocket
clutch sprocket. .
rear chainwheel
Capacities:
Fuel tank . .
Petroil mixture
Gearbox . .
Front forks . .

TECHNICAL DATA

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. . . . top
third
second
first
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5
. . . . 173 c.c.
. . . . 61·5 mm.
. . . . 58 mm.
. . . . 10/1
minimum ·009 in.
maximum ·013 in.
. . . . N4
minimum ·020 in.
maximum ·025 in.
. . . . ·012 in.
. . . . 18 degrees
(before
T.D.C.)
Supreme,
Sports Bushman
6·58
8·55
12·04
18·68
4
50 pitches 50 pitches
120 pitches 128 pitches
17 17
16 16
38 38
47 58
. . . . 1⅞ gallons
. . . . See pages
12 and 22
. . . . 1 pint
. . . . ⅛ pint
(Supreme),
1
⁄ pint
6
(Sports and
Bushman)
each leg
8·1
10·5
14·8
23·0
4