Honda XR80R Service Manual

CYLINDER HEAD/VAlVES
The cam chain tensi on adjuster has an eccentric cam
to contro l the tension of cam chain.
NOTE:
To loosen the cam chain tension:
- Loosen the
cam chain tension adjuster set plate
bo lt.
_ Tu rn to the adjusterto the punch mark facing up.
CAMSHAFT INSTALLATION
7-16
Install the rocker arms and rocker arm shafts.
NO T E:
Ali gn t he cutout of the intake arm shaft with the
bO lt hole as shown.
P LJ sh the exhaust arm shaft in comp letely.
Coat the camShaft iounals w i th molybdenum
disulfide grease.
Install the camshaft onto the cam holder w ith its
lobes facing down.
Insta ff the dowel pins.
Install the camshaft ho l der assembly and wash ers·
over the cyl inder head, the n lighten the ho lder
mO LJ nl ing nuts to the specified torque.
TORQUE:
20 N' m (2 .0 kgf·m , 14lbf· ttl
PUNCH MARK
TENSION
ADJUSTER
INTAKE SI DE
~ SHAFT
~BOLTHOLE
EXHAUST SIDE
~
SHAFT
TE NS ION AD JUSTER
CAMS~AI " HOLDER

Honda XR80R Specifications

General

Displacement	79cc
Compression Ratio	9.7:1
Fuel System	Carburetor
Ignition	CDI
Transmission	5-speed
Final Drive	Chain
Front Brake	Drum
Rear Brake	Drum
Front Tire	2.50-16
Rear Tire	3.00-14
Ground Clearance	9.1 inches
Engine Type	Air-cooled single-cylinder four-stroke
Bore x Stroke	47.5mm x 45mm
Rear Suspension	Single shock