THE HERCULES CYCLE & MOTOR CO.
BRITANNIA WORKS - ROCKY LANE --
ASTON - BIRMINGHAM 6
- Cables and Telegrams: CYMO
- Telephone: ASTON CROSS 3040 (12
LONDON ADDRESS: 2, SOHO SQUARE,
Telephone: GERrard 7544.
SCOTTISHDEPOT.: 27/29, BELLGROVE
GLASGOW, E. I. Telephone:
Here it is!
The NEW GREY WOLF
I HOPE it will not be long before
some of our own factories announce new introductions. In case
anybody has forgotten about it, there are still many customers
eager to buy British."
• MOTOR CYCLE & CYCLE TRADER"
ACCEPT THE CHALLENGE
ON MODERN UP-TO-THE-MINUTE LINES!
The "Grey Wolf" is distinctive and
Clutch and 2-speed Gear runs at
engine speeds, as in car practice, and in consequence is smaller
and lighter than the usual half-speed motor cycle gearbox.
Location of power Unit below the
road-wheel centres, and between the pedal cranks, ensures
exceptionally good riding stability, yet with ample ground
All specifications and prices are
subject to alteration without notice.
49 c.c. Two-stroke Engine, bore 42
m.m., stroke 35.5 m.m. An "oversquare" engine on the most modern
lines with ample port areas laid out particularly for good
pulling power at average speeds.
The cylinder is of cast iron with
adequate finning, held down to the aluminium crankcase by four
long studs. These also secure the aluminium alloy Head, which is
generously finned and carries the 14 m.m. Sparking Plug at the
most effective position in the machined spherical combustion
The Piston is in LO.EX aluminium
and carries two narrow rings and the circlipsecured gudgeon pin.
The connecting rod is a
high-tensile steel stamping hardened and ground in the bigend
eye, and running on 2.5 m.m. diameter rollers on the sturdy
The crankshaft runs on extra large
ball bearings. Oil seals are provided at each end of the
The Gearbox, - a separate item -
is bolted up to the engine to form one compact Unit. It contains
a multidisc clutch and two-speed gear operated by handlebar
twist-grip and clutch lever combined. A short enclosed shaft
conveys the power from engine to clutch and gearbox. Spiral
bevel gears transmit the drive to a short cross shaft carrying
the sprocket for the final drive by 1/2" P.X. 3/16" Chain to the
rear wheel. Thus there is only one chain in the power drive and
the whole transmission is exceptionally neat and compact.
Gear ratios, Top 13-8 to I. Bottom
22-7 to I.
On modern lines, built up of two
immensely strong taper-drawn " D" Section Tubes running from
steering head to rear wheel axle. Seat tube supported on
symmetrical pressings mounted upon these main members.
Pedal bracket height is the normal
10" with 5 1/2" cranks, giving good ground clearance. The pedal
cranks are straight and unusually narrow for this type of
This frame is equally suitable for
gents or ladies, having an " open "section slightly lower than a
normal lady's cycle.
This important item is based upon
the most modern bottom leading-link type. The suspension units
are of bonded rubber completely enclosed, the two substantial
bearings being shrouded within the rubber. There is nothing to
go wrong, yet everything is easily accessible. The rubber units
have a natural selfdamping effect eliminating excessive
A separate torque-link for the
front brake is a refinement which avoids any disconcerting rise
or fall of the front part of the machine when the brake is
applied or released.
Latest Dunlop, 23"X2", giving a
compact appearance and a low saddle position when required.
RIMS & SPOKES.
Chromium plated Westwood rims and
heavy gauge rustless spokes.
HUBS & BRAKES.
Both brakes are of the internal
expanding type of ample size. The rear brake is operated by
back-pedalling as in the normal coaster hub, but the mechanism
actuates expanding shoes of 4 1/4" diameter. The roller-type
free-wheel is completely enclosed and lubricated within the hub.
The rear hub is of the modern
large-centre easy-clean type.
Deep half-round section, 3" wide
for good weather protection.
Raised, well-angled type giving a
natural grip and adjustable for height.
Oversize mattress-top saddle for
easy, comfortable riding, adjustable for height and angle.
Central spring-up Stand - light,
strong and easy to operate.
A sturdy rear Carrier is provided
for parcel and luggage transport.
The fuel Tank, of compact and
pleasing appearance, is of unusually generous capacity. In
addition to a useful reserve, a full gallon of petrol and its
appropriate quantity of lubricating oil can be taken without
over-spill. This will be appreciated by those who have been
limited to half-gallon supplies. Tank capacity 1 1/4 gallons.
The exhaust system has received
particular attention and the Silencer is large enough to ensure
quiet, refined running without back-pressure. Easy dismantling
for internal cleaning is a special feature.
A special Amal type 360/4
Carburettor, with easy starting device and Twist-grip throttle
control is fitted.
IGNITION & LIGHTING.
A Miller Flywheel Magneto, with
Lighting Coils, provides ignition and lighting in conjunction
with adequate Head and Tail Lamps, and a 14 m/ m Sparking Plug.
The Electric Horn is energised
from the flywheel magneto.
The Speedometer-an optional
extrais front-wheel driven by very neat enclosed gearing. The
dial head is incorporated in the Headlamp, (dial illuminated at
night), eliminating all untidy external fittings.
A sturdy metal toolcase capable of
carrying more than averagesized tools is fitted between
seat-tube and mudguard. Tools, tyre-pump, licence-holder and
Wheelbase ... ... 45"
Lowest Saddle height ... 31"
Ground clearance under Engine ...
Pedal-bracket height ... 10"
Width inside cranks ... 6"
Weight of Machine (unladen) ... 80
Average fuel consumption ...
140-180 m.p.g. according to speed and terrain
Tax per annum ... ... 17/6d.
Normal Max. Speed ... ... 33-35