Engine Lacks Power - Honda 1988 Z50R Service Manual

TROUBLESHOOTING
ENGINE LACKS POWER
CHECK
PROBA BLE CAU SE
1. Raise wheel off ground - - - - - - W H E E l DOES NOT S P I N - - - - -- .. (l) Brake dragging
WHEEL SPINS FREELY
1
FREELY (2) Worn or damaged wheel bearing
(3) Wheel bearing not lubricated
properly
(4) Driye chain too tight
2. Check tire pressure with tire - - - - TIRE PRESSURE IS TOO ------.~ (') Punctured tire
gauge LOW (2) Faulty tire valve
TIRE PRESSURE IS NORMAL
3. Try rapid Jceleration from l o w - - - ENGINE SPEED NOT
CHANGED---<.~ (l)
Clutch slipping
to high WHEN GEAR IS CHANGED (2) Worn clutch disc.
(3) Clutch disc warped
ENGINE SPEED LOWERED
WHEN CLUTCH IS RELEASED
4 . Lightly acc!relate engine - - -- - ENGINE SPEED NOT IN-
-----~.~(1)
Carburetor choke closed
ENGINE SPEED INCREASED
1
CREASED SUFFICIENTLY 121 Restricted fuel flow
(3) Air cleaner clogged
(4) Clogged fuel tank breather
(5) Clogged muffler
5. Check ignit ion timing using - -___ IGNITION TIMING IS INCOR- _ _ _ -<.~ (1) Improper ignition timing
timing light RECT
IGNITION TIMING IS CORRECT
~
6, Check tappet cle81ance------TAPPETE CLEARANCE IS
NOT---.~ Il)
Improper tappet adjust-
TAPPET CLEARANCE IS
NORMAL
i
CORRECT ment
(21 Worn valve seat
7.
Test cylinder compression by ----COMPRESSiON IS LOW - - - - -_ .. 111 value stuck open
operating kick pedal using (21 Worn cylinder and piston rings
compression gauge (3) Blown cylinder head gasket
(4) Improper valve timing
COMPRESSION IS NORMAL
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