Sparking Plugs - Triumph SPEED TWIN 1945 Workshop Instruction Manual

Electric Horn
.-
i
If t h e h o r n become: unccrtxin i n
i t s
zction, giving only a choking sound, o r does no:
vibrate, it does n o t follow that the h o r n has broken down. First ascertain that the
t r o u b l e
i s
n o t due
to
some outside source, e.g. a discharged battery, a loose con-
nection, o r s h o r t circuit i n t h e wiring of t h e horn. In part~cular, ascertain that the
h o r n push bracket is i n good electrical contact w i t h the handlebars.
It
is also possible t h a t t h e performance of a h o r n may be upset by
i t s
mounting
becoming loose.
A d j u s t m e n t
T h e following adjustment w i l l not alter the tone of the horn. It w i l l take up any wear
o f t h e moving parts which, i f n o t corrected, may result i n loss of power and roughness
of note.
Accurate adjuscmenc requires the use of a 0-10 amp.
D.C.
ammeter-the maximum
permissible c u r r e n t consumption being 6 amperes at
6
volts-but t h e owner rider,
w h o may n o t possess one of these instruments can carry out the following procedure
i f t h e h o r n note i s considered t o have deteriorated:-
Operate t h e h o r n push and t u r n the adjustment screw anti-clockwise until the
h o r n just fails
to
sound. Release the h o r n push and t u r n the adjustment screw
clockwise f o r six notches, i.e. a quarter o f a turn, when the original performance
should be restored. If further adjustment
i s
necessary, t u r n the screw one
notch a t a time.
If the original performance cannot be restored by adjustment do not attempt
t o dismantle t h e horn; b u t return
it
t o a Lucas Service Depot f o r examination.
SPARKING PLUGS
The sparking plug
i s
of great importance i n satisfactory engine performance and every
care should be taken ro tic the correct type when replacements are necessary.
There i s l i t t l e t o be gained by experimenting w i t h different types of plugs as the type
fitted
to
standard equipment, are best suited t o your particular engine. !See
Technical Data f o r y o u r Machine). Sparking plugs required for racing purposes are
much "harder" and advice on such matters should be obtained from the manufacturers.
The correcr gap setting of the sparking plug i s .018" (0.45 mm.) (Magneto Ignition)
and 0.020" (0.50 mm.) (Coil ignition). D o n o t guess this distance b u t use a feeler
gauge which can be supplied by the plug manufacturer
a t a
very reasonable cost.
W h e n re-setting, bend the side electrode only.
Never bend the centre electrode
as this may split t h e insulator tip.
The TR5 and T I 0 0 are fitted w i t h long reach plugs which are screwed directly i n t o
t h e alloy cylinder head. If either plug indicates tightness when removing, pour
a
l i t t l e penetrating o i l around the base of the plug and allow it t o seep around the
threads. By doing this the plug w i l l be more easily removed and the cylinder head
plug threads w i l l n o t be damaged. Smear the threads w i t h graphite grease before
replaclng.