Triumph TR2 Service Instructions Manual page 330

FUEL SYSTEM
(X)
Select the jet lever of the front carb-
urettor, identified by having two holes
at the extremity of the longer arm.
This'is attached to the jet assembly by
a clevis pin and split pin, position the
second end of the lever return spring
to the jet lever.
(y) Feed the upper end of the tension link
through the rocker lever of the front
carburettor from behind and the second
end through the jet lever. Secure both
ends with split pins.
( 2 )
Select the front carburettor jet lever
l i n k , this is distinguished by the pinch
bolt at one end. This is attached to
the lug at the rear of the jet assembly
and again to the elbow of the jet lever
45.
in such a manner that the pinch bolt
end of this link points to the rear.
Both attachments are made by clevis
pins and split pins.
The assembly bf the jet lever and jet
lever link to the rear carburettor is
very similar. Both components are
shorter than those fitted to the front
carburettor.
44. TO ADJUST
THE FUEL LEVEL
IN THE FLOAT CHAMBER Fig ~ f .
The level of the fuel in the float chamber
is adjusted by setting the fork lever in
the float chamber lid. It is suggested that
the following procedure for its adjustment
is adopted.
(a)
Remove the banjo bolt of the fuel
connection and collect the two fibre
washers and filter.
H/NGED LEVER
TEST BAR
Fig.
X I
Adjusting the Fuel Level.
(b) Loosen the screw securing the float
chamber support arm to the carb-
urettor body.
(c)
Withdraw the cap nut from the centre
of the float chamber lid and remove
washers and splash overflow pipe.
(d) Swing the support arm clear to lift
the lid of the float chamber and joint
washer.
( e ) The set of the forked lever is correct
when, with the lid of the float chamber
inverted and the shank of the fork
lever resting on the needle of the
delivery valve, it is possible to pass a
6"
diameter rod between the inside
radius of the forked lever and the
flange of the lower face of the cover.
CARBURETTOR TUNING Fig. 8.
This should be carried out without the Air
Cleaners as it is found they have no effect
on balance or performance but their re-
moval considerably faciliates the operation.
One clamping bolt of a throttle rod folding
coupling should be loosened, the jet con-
necting rod should be disconnected at
one of its fork end assemblies and the choke
control cable released.
The rich mixture starting control linkage
should also be disconnected by removing
one of the clevis pins. This will enable
each carburettor to be adjusted inde-
pendently.
The suction chamber (4) and piston (3)
should be removed and the jet needle (6)
position checked. The needle shoulder,
as shown in the illustration, should be
flush with the base of the recess in the
piston. The chamber and piston are now
replaced.
The oil reservoir should be full and damp-
i n g affect should be felt when replacing
piston when the securing nut is
a"
from
the top of the suction chamber.
It is recommended that the adjusting nut
(18) is screwed fully home and then slack-
ened back two and a half turns (fifteen flats)
as an initial setting.
The throttle adjusting screw (2) on each
carburettor should be adjusted until it
will just hold a thin piece of paper between
the screw and the stop when the throttle is
held in the closed position. The throttle
butterfly (1) on each carburettor should
then be opened by one complete turn of
the adjusting screw.