Honda XR80R Service Manual

CYLINDER HEAD/VAlVES
Marl< aff PJ)flS Remove the follo wing:
dlJring diSJIssemtJly
s..thc y canba
installed jn t~jr
OtiginallocalfoN,
Avoid damaging the
gasket ~urface
- Spr ing reta iner
- Outer and in "" r valve spri ng s
-
Va lve
- Stem se al
- Va lve spring seal
INSPECTION
CVlINDER HEAD
Remove carbon depOsits from the combustion
chambe r.
Chack t he spar1< plug ho le and valve areas f or cracks_
Chock th e cylinder head for warpage w ith a strai ght
edge and feeler gauge.
SERVI CE LIMIT; 0.10 mm (0. 004 inf
XR 100R
SHOWN,
SPR'NGS EAT
( AFTER :) '
XR BOR SHOWN:
S
PR ING
SEAT
SPRINGS
\
COTTERS
EXHAUST
VALVE
SPR INGS
" ;/
·e~
INTAKE VALVE! ;-e ....
STE M SEAL \
RETAINER STEM SEAL COTTERS
RETAI
NER

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