Twin
carburetors
The
twin carburetors fitted to the T140E may require synchronisation and
a
simple method
is
as follows:
First adjust the cables from the junction box so that they have the mini-
mum
of free play.
Now
start the motor and take off one plug lead and then
adjust the
pilot air screw and throttle stop screw in the OPPOSITE
carburetor until the motor runs regularly. Replace the plug lead and
repeat the process
similarly for the other carburetor. With both plug leads
repl
ced
the tickover will be too fast and the stop screws should be
lowered simultaneously until correct.
It
is most important that the throttle
slides lift simultaneously or the motor will run roughly, particularly when
accelerating.
ELECTRICAt EQUIPMENT
The electrical
system
is supplied from an alternating current generator
contained
in the primary chaincase and driven from the crankshaft. The
generator
output is then converted into direct current by a silicon diode
rectifier. Direct current
is
supplied to the battery with a Zener diode
in
circuit to regulate the current that the battery receives, this depending
entirely on the state of charge of the battery.
The
current is then supplied to the ignition system which
is
controlled by
a
double
contact breaker driven direct from the exhaust camshaft.
~he
contact breaker feeds two ignition coils. one for each cylinder. In the case
of a
flat battery the machine can still be started without difficulty by
switching on the ignition as with the
normal starting procedure.
The routine maintenance needed by the various components is set out
in
the following paragraphs. All electrical components and connections
including the earth points to the frame of the machine must be
CLEAN
and TIGHT.
Contact
breaker unit
The
contact
breaker
is
contained behind the round chromium-plated
cover
held by two screws on the right side of the motor. The nylon heels
of the moving contacts may settle down initially and it necessary to check
both contact breaker gaps after
500 miles.
34
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