Honda XR80R Service Manual

TROUBLESHOOTING
POOR PERFORMAMCE AT HIGH SPEED
Possible c ause
1. Oi$CO""ect 1 ue l t\J~ and ch ed tr.e ----- Fuell l cw , e;,u ic1 ed --- .- • Cl09ged lue! line
fuei l low • Cl og ged fuel tank breather tu be
I • Fa ulty luel val va
Fuel flows freely • Clogged fuel jilter
j
2. Re move the ca rburet or and chec ~ for ---- CI 09ge d ------- •• - • Clean
cl ogging
I
Not clogged
j
3. Check valve tim ing ------- - ----l rl Correcl ------- __ • Ca m sprocket not installed
I properl y
Correct
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4. Check ign ition timin g ----- ------ Inco •• ecl --- ____ _ .. • Faulty ignition control module
I . Faulty ignition pulse g enerato r
Correct
j
5. Check va lve spring --------- --- Weak -------- _. • Faulty spring
j
Not w eak
POOR HANDLING
Possi ble cause
If steer ing is heavy ----------------- ----- _. • Steering stem adjusti ng nut too
tight
• Da mage d sleering head bearings
2.
If either whee l i~ wobbl ing ------------------- - .. • Excessive wh eel bearing play
• Bent
rim
" Imp rope r i ns talled wheel hub
• Swi n garm pivot bushing
excessi v" ly worn
" Bent fr ame
3. If the m otorcycle pulls to one side -------- ---- - --- _ _ • Faulty shock absorber
15-4
• Fr ont and rear wheel not aligned
" Bent fork
" Bent
sw i ngar m
• B<lnt axle

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