D14/4GENERAL DATAGD1

INDEX

SUPREME MODELSPage          
ENGINE:
 PistonGD3
Piston RingsGD3
Cylinder BarrelGD3
Ignition TimingGD3
CarburetterGD3
Bearing DimensionsGD4
 
 
TRANSMISSION:
ClutchGD4
SprocketsGD4
Chain SizeGD4
Gear RatiosGD5
 
 
FRAME AND FITTINGS:
Front ForksGD5
Rear DampersGD5
Swinging ArmGD5
BushesGD5
 
 
WHEELS, BRAKES AND TYRES:
WheelsGD6
Wheel BearingsGD6
BrakesGD6
TyresGD6
 
 
ELECTRICAL EQUIPMENTGD6
 
 
CAPACITIESGD7
 
 
BASIC DIMENSIONSGD7
 
 
WEIGHTSGD7




D14/4GENERAL DATAGD2

INDEX—continued

Page          
SPORTS MODELS
ENGINE:
 CarburetterGD8

FRONT FORKS:
BushesGD8

WHEELSGD8

BASIC DIMENSIONSGD8

WEIGHTGD8


BUSHMAN MODELS
ENGINE:
 Bearing DimensionsGD9
ForksGD9
CarburetterGD9

TRANSMISSION:
Gear RatiosGD9
Chain SizesGD9


BUSHMAN PASTORAL MODELS
TRANSMISSION:
 Gear RatiosGD9
SprocketsGD9
Chain SizesGD9

WHEELS, BRAKES AND TYRES:
WheelsGD9
TyresGD10

ELECTRICAL EQUIPMENTGD10

BASIC DIMENSIONSGD10

WEIGHTSGD10


D14/4GENERAL DATAGD3


ENGINE


PISTON
Material"Lo-ex" aluminium
Compression ratio10 : 1
Clearance (bottom of skirt)0•0038—0•0039"(0•096—0•099 mm.)
Clearance (top of skirt)0•0077—0•0078"(0•195—0•198 mm.)
       (both measured on major axis)


PISTON RINGS
MaterialCast-Iron
Width0•097—0•102"(2•463—2•590 mm.)
Depth0•0615—0•0625"(1•562—1•587 mm.)
Clearance in groove0•0025"(0•0635 mm.)
Fitted gap (maximum)•013"(•3302 mm.)
Fitted gap (minimum)•009"(•2286 mm.)


CYLINDER BARREL
MaterialClose-grained cylinder iron
Bore size (standard)61•5 mm.
Stroke58 mm.
Oversizes•020" & •040"(•508 mm. & 1•016 mm.)
Inlet port size1"(25•4 mm.)
Exhaust port size1Ό"(32 mm.)


IGNITION TIMING (Fixed)
Crankshaft (before top dead centre)16•5Ί
Piston (before top dead centre)0•060"(1•524 mm.)


CARBURETTER (Concentric)
TypeAmal R626/12
Main jet160
Pilot jet25
Needle jet size•105"(2•667 mm.)
Needle position3
Throttle valve3
Nominal choke size26 mm.
Throttle slide return spring (free length)3-1/16"(78 mm.)


D14/4GENERAL DATAGD4


BEARING DIMENSIONS
Crankshaft bearing (left- and right-hand)•75 Χ 1•875 Χ •5625"
(19•05 Χ 47•625 Χ 14•2875 mm.)
Crankshaft bearing outer (right-hand)17 Χ 40 Χ 12 mm.
Layshaft bush, left- and right-hand (bore)•6105—•6115"(15•507—15•532 mm.)
Gearbox sleeve pinion bearing•875 Χ 1•875 Χ •375"
(22•225 Χ 47•625 Χ 9•525 mm.)
Mainshaft final drive gear bush (bore)•4965—•4975"(12•611—12•636 mm.)
Mainshaft diameter (gear-side)•6247—•6250"(15•867—15•944 mm.)
Mainshaft diameter (drive-side)•498—•499"(12•649—12•675 mm.)
Layshaft diameter (left- and right-hand)•6095—•6100"(15•481—15•608 mm.)
Gearbox mainshaft bearing•625 Χ 1•5625 Χ •4735"
(15•875 Χ 39•6875 Χ 11•1125 mm.)
Big-end roller (18)4 Χ 8 mm.
Small-end bearing•5625 Χ •75 Χ •625"
(14•2875 Χ 19•05 Χ 15•875 mm.)
Gudgeon pin diameter•5617—•5620"(14•267—14•275 mm.)


TRANSMISSION

CLUTCH
TypeMulti-plate
Number of plates7
Driving (bonded segments)4
Driven (plain)3
Overall thickness of driving plates and segments"(3 mm.)
Clutch springs6
Free length of springs1-9/64"(29 mm.)
Clutch push rod, short (length)1•998—2•002"(50•75—50•85 mm.)
Clutch push rod, short (diameter)•186—•188"(4•7244—4•7752 mm.)
Clutch push rod, long (length)5•778—5•782"(146•76—146•86 mm.)
Clutch push rod, long (diameter)•180—•182"(4•57—4•62 mm.)


SPROCKETS
Engine17 teeth
Clutch38 teeth
Gearbox16 teeth
Rear wheel47 teeth


CHAIN SIZE
0•500 Χ 0•205 Χ 120 links

D14/4GENERAL DATAGD5


GEAR RATIOS
Gearbox—(top)1•0                 :1
             —(third)1•301             :1
             —(second)1•831             :1
             —(first)2•843             :1

Overall  —(top)6•57               :1
             —(third)8•55               :1
             —(second)12•03             :1
             —(first)18•68             :1


FRAME AND FITTINGS

FRONT FORKS
TypeCoil spring, hydraulically-damped
Springs:
      (free length)17Ό"(43.8 cm.)
      (spring rate)35 lb./in.
      (number of coils)82
Shaft diameter (top)1•045—1•046"(26•543—26•568 mm.)
Shaft diameter (base)1•000—1•001"(25•4—25•425 mm.)
Sliding tube bore1•125—1•129"(28•575—28•677 mm.)
Upper bush (outer diameter)1•121—1•122"(28•473—28•499 mm.)
Upper bush (bore)1•058—1•059"(26•873—26•899 mm.)
Working clearance0•013"(0•330 mm.)
Lower bush (outer diameter)1•118—1•119"(28•397—28•425 mm.)
Lower bush (bore)1•000—1•001"(25•4—25•425 mm.)
Working clearance0•006—0•011"(0•152—0•279 mm.)
Length (upper and lower)1"(25•4 mm.)


REAR DAMPERS
TypeCoil spring, hydraulically-damped
Springs:
      (fitted length)5•7"(144•78 mm.)
      (spring rate)100 lb./in.
      (colour identification)Yellow/tan


SWINGING ARM
Bush materialPhosphor-bronze
Bush (outside diameter)•993—•994"(25•22—25•24 mm.)
Bush (bore)•860—•865"(21•84—21•97 mm.)
Housing diameter•990—•991"(25•14—25•17 mm.)
Interference fit on spindle•0085—•014"(•215—•355 mm.)
Spindle diameter•8735—•8740"(22•187—22•200 mm.)

D14/4GENERAL DATAGD6


WHEELS, BRAKES AND TYRES
WHEELS
Rim size and type (front and rear)WM1-18
Spoke sizes:
      (front, left-hand)12 s.w.g. Χ 8-1/16"(2•641 Χ 204•78 mm.)
      (front, right-hand, inner)12 s.w.g. Χ 6½"(2•641 Χ 165•1 mm.)
      (front, right-hand, outer)12 s.w.g. Χ 6-9/16"(2•641 Χ 166•69 mm.)
      (rear, right-hand)10 s.w.g. Χ 7-5/16"(3•251 Χ 201•612 mm.)
      (rear, left-hand, inner)10 s.w.g. Χ 6½"(3•251 Χ 165•1 mm.)
      (rear, left-hand, outer)10 s.w.g. Χ 6½"(3•251 Χ 165•1 mm.)


WHEEL BEARINGS
Front:
      (left-hand)15 Χ 35 Χ 11 mm.
      (right-hand)17 Χ 40 Χ 12 mm.
      Spindle diameter (at ground portions):
      (right-hand)•6687—•6692"(16•985—16•998 mm.)
      (left-hand)•5899—•5904"(14•9835—14•9962 mm.)
Rear:
      (left- and right-hand)17 Χ 40 Χ 12 mm.
      Spindle diameter (at ground portions):•6687—•6692"(16•985—16•998 mm.)


BRAKES
Front and rear (diameter)5½"(139•7 mm.)
Front and rear (width)1"(25•4 mm.)
Lining thickness5/32"(•4 mm.)
Total lining area (front and rear)20 sq. in.(129 sq. cm.)


TYRES
Size (front and rear)3•00 Χ 18"
Pressure (front)17 p.s.i.(1•2 atm)
Pressure (rear)22 p.s.i.(1•5 atm)
      (see also page F12)


ELECTRICAL EQUIPMENT (6 volt)
BatteryLucas 6 volt PUZ5E/11
Alternator typeWipac 1G1768
Contact breaker unitWipac S0584
Ignition coilWipac S0769
RectifierWipac S2642
Bulbs:
      (headlight, main)30/24 watt pre-focus
      (headlight, pilot)3 watt M.E.S.
      (stop/tail light)6/18 watt S.B.C. staggered pin
      (speedometer light)0•6 watt B.A. 7S lug cap
HornClearhooter HF900

D14/4GENERAL DATAGD7


CAPACITIES
Petroil proportionSee page A3
Fuel tank1•875 gallons or
2•25 U.S. gallons
(8•5 litre)
GearboxΎ-pint(0•5 litre)
Front fork (each leg)-pint(0•07 litre)


BASIC DIMENSIONS
Wheelbase50•0"(127 cm.)
Overall length77•5"(196•85 cm.)
Handlebar width27•75"(70•49 cm.)
Seat height (unladen)31"(78•74 cm.)
Overall height (approximate)40•0"(101•6 cm.)
Ground clearance6•75"(17•15 cm.)


WEIGHTS
Machine (unladen)215 lbs.(97•5 kg.)
Engine/gearbox unit (less carburetter)51 lbs.(23 kg.)

D14/4GENERAL DATAGD8


D14 BANTAM SPORTS MODELS
All general data is the same as that given in preceding pages
for the Supreme models except for the following:—

CARBURETTER
Concentric R626/13


FRONT FORKS
Shaft diameter1•248—1•249"(31•70—31•72 mm.)
Sliding tube bore1•475—1•477"(37•46—37•51 mm.)


BUSHES
Upper bush (outside diameter)1•4750—1•4755"(37•465—37•477 mm.)
Upper bush (bore)1•250—1•251"(31•750—31•775 mm.)
Working clearance0•001—0•003"(0•025—0•076 mm.)
Length2" overall(28•5 mm.)
Lower bush (outside diameter)1•473—1•474"(37•44—37•41 mm.)
Lower bush (bore)1•2485—1•2495"(31•714—31•737 mm.)
Working clearance0•001—0•004"(0•025—0•102 mm.)
Length1Ό" overall(31•75 mm.)


WHEELS
Spoke sizes:
      (front, left-hand)12 s.w.g. Χ 6-21/32"(2•641 Χ 169•069 mm.)
      (rear, right-hand)10 s.w.g. Χ 6-9/16"(3•251 Χ 166•687 mm.)


BASIC DIMENSIONS
Seat height (unladen)30•5"(77•47 cm.)
Handlebar width23"(58•42 cm.)
Overall height (approximate)37•5"(95•25 cm.)


WEIGHT
Weight221 lbs.(100•24 kg.)


CAPACITY
Front forks (each leg) pint(0•175 litre)

D14/4GENERAL DATAGD9


D14 BUSHMAN MODELS
All general data is the same as that given in preceding pages
for the Supreme models except for the following:—


BEARING DIMENSIONS
ForksAs Bantam Sports models


CARBURETTERS (Concentric)
TypeAmal R626/12

TRANSMISSION
(Standard D14 Bushman models)
GEAR RATIOS
As Bantam Supreme models


CHAIN SIZES
Transmission•500 Χ 0•205" Χ 120 links

TRANSMISSION
(D14 Bushman Pastoral models)
GEAR RATIOS
GearboxAs Bantam Supreme models
Overall—(top)8•10 :1
           —(third)10•54 :1
           —(second)14•83 :1
           —(first)23•03 :1


SPROCKETS
Rear wheel58 teeth


CHAIN SIZES
Transmission•500 Χ 0•205" Χ 126 links

WHEELS, BRAKES AND TYRES
WHEELS
Rim size and type (front)WM1-19
Rim size and type (rear)WM2-19
Spoke size:
      (front, left-hand)12 s.w.g. Χ 8"(2•641 Χ 225•42 mm.)
      (front, right-hand, inner)12 s.w.g. Χ 7-1/16"(2•641 Χ 179•38 mm.)
      (front, right-hand, outer)12 s.w.g. Χ 7"(2•641 Χ 177•8 mm.)
      (rear, left-hand)10 s.w.g. Χ 6-29/32"(3•251 Χ 175•42 mm.)
      (rear, right-hand)10 s.w.g. Χ 8Ύ"(3•251 Χ 222•25 mm.)

D14/4GENERAL DATAGD10


TYRES
Size (front and rear)3•00 Χ 19"
Pressure (front)17 p.s.i.(1•2 atm)
Pressure (rear)22 p.s.i.(1•5 atm)


ELECTRICAL EQUIPMENT (Direct Lighting)
Alternator typeWipac 1G1791
Contact breaker unitWipac S0584
Ignition coilLucas 3E.T.
Bulbs (headlight, main)24/24 watt pre-focus
      (The battery, rectifier, headlight pilot bulb
      and horn are not fitted to these models)


BASIC DIMENSIONS
Overall length78"(198 cm.)
Handlebar width28•5"(72 cm.)
Seat height (unladen)30•5"(77•5 cm.)
Ground clearance10"(25 cm.)
Overall height (approximate)40•5"(103 cm.)


WEIGHT
Machine (unladen)222 lbs.(100•5 kg.)