11. Valve Gear
The valves are operated from the camshaft by
means of large, flat-based, guided tappets,
tubular alloy push rods with induction hardened
steel
ends
and
overhead
rockers.
Two
compression springs are fitted to each valve
secured by Bullock Type split collets locking in
Timinium collars. The springs are specially
designed to give a variable rate on compression.
12. Timing Drive
The camshafts are located in the crankcase,
running in bronze bushes. They are driven by a
common endless chain from the timing sprocket
on the crankshaft and the tightness of the chain
can be adjusted by means of the chain tensioner
in the timing chest.
The magneto is driven by a separate endless
chain from the rear camshaft sprocket in the
timing chest. The tension of this chain is
adjusted by moving the magneto fixing bolts in
their slotted holes.
A special slotted bolt securing the front
camshaft sprocket provides a drive to a
tachometer if this is required. This drive can be
fixed to an aperture provided in the timing
cover, which is otherwise covered by a small
plate.
13.
Ignition and Lighting System (
See Section
G)
The ignition is supplied from a Lucas K2F
magneto and the lighting and other electrical
circuits from a 6-volt battery which is charged
through a rectifier from a Lucas alternator.
The alternator is housed in the primary
chaincase, the permanent magnet rotor being
mounted on the end of the crankshaft and the six
coil stator fixed to the back of the chaincase.
The magneto is chain-driven from the inlet
camshaft at half engine speed and the timing is
hand controlled from a lever on the handlebar.
14.
Single Carburettor
(see Section F)
The carburettor is an Amal Type Tl0.TT9,
with a bore of 1.3/16 inches.
For very high speeds it is essential to have an
independent float chamber flexibly mounted as
near the centre-line of the machine as possible.
Section B11 Page 2
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Содержание CONSTELLATION 1958
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Страница 21: ...Section C4 Page 2 w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
Страница 39: ...1959 SUPER METEOR w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
Страница 43: ...1961 SUPER METEOR w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
Страница 45: ...Section E4 Page 2 w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
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Страница 67: ...1961 CONSTELLATION w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
Страница 80: ...Section H5 Page 1 w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
Страница 97: ...Section M6 Page 1 SECTION M6 Special Tools w w w h i t c h c o c k s m o t o r c y c l e s c o m ...
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