Engine Lacks Power - Honda ATC200S Workshop Manual

TROU BLESHOOTI NG
ENGINE LACKS POWER
Probable Cause:
1.
Raise wheel~ off ground and spin
WHEEL DOES NOT SP IN
•
(1) Brake dragging
by
hand
FREELY
(2) Worn Or damaged wheel
be aring
WHEEL SP INS FREELY
131
Wheel bearing needs
I
lubricat ion
'"
Drive chain too tight
151
Rear ax le nut excessively
tightened
2. Check tire pressure w ith tire PRESSURE TOO LOW
•
111
Pu nctured tire
~",.
121
FalJlty tire valve
PRESSURE NORMAL
I
3. Try rap id acceleration from low to
ENG INE SPEED DOES NOT
•
111 C llJtch slipping
=0,,"
CHANGE WHEN CLUTCH IS
121
Worn cll11ch disc/plate
RELEASED
(3)
Warped clutc'n d"lscl plate
ENGINE SPEED LOWERED WHEN
CLU TCH IS RELEASED
,.
Light ly accelerate engine ENGINE SPEED NOT IN·
•
111
Carburetor choke closed
CREASED SUFFICIENTLY
121
Clogged a ir cleaner
ENGINE SPEED INCREASED
(31
Restricted flJelllow
I
' " Clogged fuel tank breather
woo
151
Clogged muffler
5. Check ignition timing INCORRECT
•
111
FaUlty COl unit
121 Fau lty pu lser generator
CORRECT
(31
Faulty ignition advancer
6.
I
Check va lve clearance
INCORRECT
•
111 Improper valve adjuument
I 121
Worn valve seat
,
Test cylinder compression TOO LOW
•
111
Valve stuck open
using a compreuion gauge
121
Worn cylinder and piston
ri r>gs
NORMAL
131
Leaking head gasket
cJ. ~,b","o,
'0' """I",
'"
Improper va lve t imir>g
151
Improperly adjustl!'d starter
decompressor
8.
CLOGGED
•
'"
Carburetor not serviced
frequently enough
NOT CLOGGED
I
9. Remove spark plug FOULED OR DISCOLORED
•
'" Plug not serviced frequently
enough
NOT FOULED OR DISCOLORED
121 Use of plug with improper
I
heat range
17-2
206