Honda CB900F Service Manual page 429

TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
Possib le cau se
1. Check ignition timing - - - - - - -- - - - Inco rrect
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Correc t
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2. Inspect the fuel flow - -- - -- - - - - - Abno rmal
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Normal
- - - - - --1 .. . . .
Faul t y ECM
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• Faulty pressure regulator (Section 5)
- - - -- ---1 .. . . .
Camshaft not install ed properly
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3. Inspect the fuel in ject or - - - -- - - - - - Abnorma l - - - - - -.... ... See section 5
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Normal
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4. Check va lve ti min g - - - - -- - - - -- -Incorrect
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Correct
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5. Chec k va lve spri ng - - - - - - -- - - - -Weak - - -- - - - - -..
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• Faul t y va lve spring
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Not wea k
POOR HANDLING
Possible cause
1. If steering is heavy
- -- - - - - - - - - - - - - - - - - - - - --1 .. . .
St eering stem adjusting nut too tight
Dama ged steeri ng head bearings
2. If eit her w hee l is w obbli ng - - - - -- -- - -- - - - - -- - -- ..
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• Excess ive w hee l bearing play
Bent rim
Improper installed wheel hu b
Swin garm pivot bearin g excessi ve ly
wo rn
Bent frame
3. If t he motorcycle pulls to on e side
21-4
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Faul ty shock ab sorber
Front and rea r wh eel n ot ali g ned
Bent for k
Bent sw inga rm
Bent axl e