Honda SH300I 2006, Manual

Page: 84 / 511

MAINTENANCE
4-10
Sixty-nine different
thickness shims are
available from the
thinnest 1.200 mm
thickness shim to
the thickest 2.900
mm thickness shim
in intervals of 0.025
mm.
Calculate the new shim thickness using the equa-
tion below.
A = (B – C) + D
A: New shim thickness
B: Recorded valve clearance
C: Specified valve clearance
D: Old shim thickness
• Make sure of the correct shim thickness by mea-
suring the shim by micrometer.
• Reface the valve seat if carbon deposit result in a
calculated dimension of over 2.900 mm.
Install the shims in
their original loca-
tions.
Install the newly selected shim on the valve spring
retainer.
Rotate the camshafts by rotating the drive pulley
(crankshaft) counterclockwise several times.
Recheck the valve clearance.
Check that the O-ring is in good condition, replace if
necessary.
Apply engine oil to the timing hole cap O-ring.
Apply engine oil to the timing hole threads and
seating surface.
Tighten the timing hole cap to the specified torque.
Install the following:
– belt case air cleaner housing (page 4-16)
– cylinder head cover (page 9-24)
– maintenance lid (page 3-4)
ENGINE OIL
OIL LEVEL CHECK
Place the scooter on its centerstand on a level sur-
face.
Start the engine and let it idle for 3 – 5 minutes.
Stop the engine and wait for 2 – 3 minutes.
Remove the oil filler cap/dipstick and wipe the oil
from the dipstick with a clean cloth.
Insert the oil filler cap/dipstick without screwing it
in, remove it and check the oil level.
The level should be between the upper and lower
level lines on the dipstick.
1.875 mm
1.85 mm
1.80 mm
1.825 mm
ROCKER ARM
SHIMS
SHIMS
ROCKER ARM
TORQUE: 6 N·m (0.6 kgf·m, 4.4 lbf·ft)
O-RING
TIMING HOLE CAP
FILLER CAP/DIPSTICK
UPPER
LOWER