to be pbised on ;he open road by a lightweight, but the r~der ofa new model must
control his impulses, happy In the thought that the treatment he is giving his engine
will mean considerably improved performance at the end of the running-in period.
When a machine is intelligently and carefully run-in,
it
will be faster, mechanically
quieter, and
will
wear longer than the mount of a rider who pays no attention to
the tiner points of running-in.
With
a new machine, speed, within reason, does
1
not greatly come into the question; the main idea to keep in one's mind
is
that the
engine must never be stressed. By far the best ind~cation
is
the amount of throttle
opening, and during the initial stages more than about a quarter throttle should not
be used.
I
The engine must not be allowed to slog in the higher gear ratios;
it
is
far better to
change down to a lower gear when the engine will be revving faster, but much more
easily.
It
is a gwd plan to put a little spot of white paint on the twistgrip rubber
and a spot of black paint on the chromium plated twistgrip body, in such a position
that these coincide when the throttle is closed.
It
is
then easy to estimate the throttle
opening during the running-in period and the "spots" can be easily removed. or the
position of the white one altered.
After about
250
miles have been covered, the throttle opening can be increased to
say a third, and this means that the speed will gradually increase. A further amount
of throttle can be used
as
the running-in progresses, until the full throttle opening
has been worked up to at about
1,200
miles.
Following the principle throughout that the engine must never be unduly stressed,
speed bursts wiil be carried out progressively. With experience
it
may be found
that
at
a certain throttle opening the machine will easily reach
50
miles per haur.
When the speedometer needle touches that speed for the
first
time, the engine
should immediately be throttled down. After
a
period of slower running, the
50
m.p.h. mark can be worked up to again, and this time held for a little longer.
By gradually working up in this way, the time will come when the first of a few miles
at
50
m.p.h. has been arrived
at
progressively. The same care should be taken when
higher speeds are reached. With the higher performance machines in thc Triumph
range, similar care should be taken to see that the maximum speed
is
worked up to
very carefully and
is
only held for a very short period initially. At really high speeds
it
is
advantageous to close the throttle momentarily
at
regular intervals, as this
enables an increased amount
of
oil to pass up the cylinder bore.
When the engine
is
thoroughly run-in this precaution is, of course, unnecessary.
During the running-in period great care must be taken to follow the lubrication
instructions which wiil be found on page
31.
Lastly, do not forget that you will have plenty of time to try the paces of your new
mount during the many thousands of miles you will cover after the running-in period
has been completed. Never be tempted to "see what she will do" in the early
stages, and do not be persuaded by your friends to test the speed of the machine
against theirs until you are quite satisfied that your engine
is
thoroughly run-in.
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