Poor Performance At High Speeds; Poor Handling - Honda XR80R Service Manual

TROUBLESHOOTING
POOR PERFORMAMCE AT HIGH SPEED
Possible cause
1. Oi$CO""ect 1uel
t\J~
and c hed tr.e - - - - - Fuell lcw ,e;,u ic1ed - - -.- • Cl09ged lue! line
fuei l low • Clog ged f uel t ank breather tu be
I • Fa ulty lue l va lva
Fuel flows f reely • Clogged f uel jilter
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2. Remove the ca rbur etor and
chec ~
fo r - - - - CI09ge d - - - - - - -•• - • Clean
c logging
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Not clogged
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3. Chec k valve tim in g - - - - - - -- - - - - l rlCorrecl - - - - - - -__ • Ca m sp rocket no t install ed
I
properly
Correct
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4. Check ignit ion timin g - - - - -- - - - - - Inco •• ecl - - -_ _ _ __ .. • Faulty ignition control module
I .
Faulty ignition pulse generato r
Correct
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5. Check v alve spring - - - - - - - - -- - - Wea k - - - - - - - -_. • Faulty spri ng
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Not w ea k
POOR HANDLING
Poss ible cause
If steeri ng is heavy - - - - - - - - - - - - - - - - -- - - - -_. • Steering stem adjusti ng n ut too
t ight
• Damaged sl eeri ng head bearings
2. If either whee l
i~
wobbl i ng - - - - - - - - - - - - - - - - - - -- .. • Ex cessi v e wh ee l bearin g play
• Bent rim
" Im prope r installed wheel h ub
• Swi ngarm pivot bushing
excess iv" ly worn
" Bent frame
3. If th e m otorcycle pu lls to one side - - - - - - - -- - - -- - - -_ _ • Fau lty shock absorber
15-4
• Front and rear wheel not aligned
" Bent fork
" Ben t swingarm
• B<lnt
axl e