Honda SH300 2009 User Manual

LUBRICATION SYSTEM
5-7
OIL PRESSURE RELIEF VALVE
REMOVAL
Separate the crankcase (page 14-5).
Remove the oil pressure relief valve and O-ring
from the left crankcase.
INSPECTION
• Be careful not to loose the disassemble parts.
Check the operation of the oil pressure relief valve
by pushing on the piston.
Remove the snap ring, washer, spring and piston
from the oil pressure relief valve body.
Check the piston for wear, sticking or damage.
Check the valve spring for wear or damage.
Check the relief valve body for clogging or damage.
Clean all parts and assemble the relief valve in the
reverse order of disassembly.
• Install the snap ring with the chamfered edge
facing the thrust load side.
• Do not reuse worn snap ring which could easily
spin in the groove.
• Check that the snap ring is seated in the groove.
INSTALLATION
Coat a new O-ring with engine oil and install it to
the oil pressure relief valve.
Install the oil pressure relief valve into the left crank-
case.
Assemble the crankcase (page 14-14).
RELIEF VALVE
O-RING
The snap ring is
under spring pres-
sure. Use care
when removing it
and wear eye and
face protection.
SNAP RING
PISTON
WASHER
SPRING
SNAP RING
RELIEF VALVE BODY
RELIEF VALVE
O-RING

Honda SH300 2009 Specifications

General

Displacement	279.1 cc
Bore x Stroke	72 mm x 68.5 mm
Compression Ratio	10.5:1
Fuel System	PGM-FI electronic fuel injection
Front Tire	110/70-16
Rear Tire	130/70-16
Width	730 mm
Height	1, 195 mm
Wheelbase	1, 420 mm
Engine Type	Liquid-cooled, 4-stroke, single-cylinder
Max Torque	26.5 Nm @ 6, 000 rpm
Transmission	V-Matic
Front Suspension	Telescopic fork, 35 mm
Rear Suspension	Twin shock absorbers
Front Brake	256mm hydraulic disc
Rear Brake	240 mm disc