Triumph SPEED TWIN 1955 User Manual

Tappet Adjustment
I
.--- -. .--. .-..rim-,
TAPPET ADJUSTMENT (stt surrl-tmt~ I)
(Models ST, 6T & TIM))
I
These models are fitted with camshafts employing a Ramp-Cam form which makes it
necessary to maintain a 0.010" (0.26 mm.) clearance (COLD), between the valve
I
rocker adjusting pin and the valve tip in order to ensure silent operation and
maximum efficiency. If the clearance
is appreciably iess the valve timing will be
affected resulting in loss of power and the possibility of burnt valves.
Models TI10
& TR5
These models have high-lift czmshafts and no silencing ramps are incorporated in the
cam form. The tappet adjustment, therefore, differs from the other models, the
inlet being set at 0.002" (0.05 mm.) and the exhaust at 0.004" (0.10 mm.).
i I
ADJUSTMENT (COLD) I
i
Rocker Box Inspection Caps.
Remove all four from the rocker boxes.
Positioning the Valves. This operation
is made easier by first removing the
sparking plugs.
Turn the engine
by the kickstarter until the timing side exhaust
valve
is fully open. This ensures that the other exhaust valve tappet is making
conract with the base of the cam and no error can be made when checking or
re-adjusting
it.
Tools. In the toolkit, t,~o spanners are provided for this adjustment. (See Fig. 8).
Fig. 8.
ADJUSTING
THE TAPPETS

Triumph SPEED TWIN 1955 Specifications

General

Brand	Triumph
Model	SPEED TWIN 1955
Category	Motorcycle
Language	English