Poor Performance At High Speed; Poor Handling - Honda 1988 Z50R Service Manual

TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEED
CH ECK
1. Check ignition timing and
valve clearance
CORRECT
2. Disctnnect fuel tube at
carburetor
FUEL flOWS FREELY
I
3 . Remove carburetor and
check for clogged jet
NOT CLOGGED
j
4 . Check valve timing
CORRECT
+
5 Check valve spring tension
NOT WEAKENED
POOR HANDLING
CHECK
1. Check t ire pressure
PROBABLE CAUSE
INCORAECT----------~. (1) Improper valve clearance
(2) Faulty ignition control module
(3) Faully ignition pulse generator
(4) Improper flywheel installation
FUEL FLOW RESTAICTEDI-----___ 11 ) lack of fuel in tank
(2 ) Clogged fuel line
(31 Clogged fuel tank cap
breather hole
(4 ) Clogged fuel valve
CLOGGED, - -- - - - - - - - --. Clean
INCQRRECT------------__ Cam sprocket not installed
properly
W E A K - - - - - - - - - - - - - -_. Faulty spring
PROBABLE CAUSE
2. If steering is heavy
- - - - - - - - - - - - - - - - - - - - - - - " •• (1) Top thread too tight
3. If either wheel is wobbling
(2) Damaged steering head bearing
- - - - - - - - - - - - - - - - - - - - -... (1) Excessive wheel bearing play
(2) Bent rim
(3) Improperly installed wheel hub
(4) Swingarm bushings
excessively worn
(5) Bent frame
(6) Loose sw ingarm pivot bolt
4. If the motorcycle pulls to one side
- - - - - - - - - - - - - - - - - -... (1)
Front and rear wheels not
aligned
(2) Bent front fork
(3) Bent swingarm or frame
15-4