Robin EY08D User Manual

5-4-8 TAPPET ADJUSTMENT
Lower the tappet all the way down, push the valve, and insert a thickness gauge between the valve and tap-
pet stem to measure the clearance. (See
Fig. 32.)
Note: The correct tappet clearance for both intake and exhaust valves is 0.1 mm k0.02 mm as measured
when the engine
is cold.
Thickness Gauge
Fig. 32
I Valve
Valve Spring
Valve Spring Retainer
fig. 33
- Note: If the clearance is smaller than specified, slightly grind the top of the valve stem, and measure it again.
On the contrary,
if the clearance is too large, replace the valve with new one, and polish its contact
surface with a compound to obtain a good fit. Then adjust the clearance.
Note: After the tappet clearance adjustment, install the valve springs and the valve spring retainers, and turn
the crankshaft, and measure the tappet clearance once again if
it is correct.
n
Note: INSTAL LA TION of SPRING RETAINERS
Place the notch
on the outer circumference of
the retainer toward this side and insert the re-
tainer, like pushing in, using a special tool.
lf
a driver is used, insertion may be easier.
Front should be this side.
5-4-9 CYLINDER HEAD
\-I Driver
‘\
Valve Spl
l Retainer
kg
Fig. 34
Remove carbon from the cylinder head, particularly its combustion chamber, and make clean the cooling
fins.
Also check the head for distortion.
Note: Replace the cylinder head gasket with a new one.
Note: Cylinder head tightening torque:
90 - 110 kg-cm
/”-.
- 22 -

Robin EY08D Specifications

General

Brand	Robin
Model	EY08D
Category	Engine
Language	English