KYMCO DINK 200i Service Manual page 35

1. GENERAL INFORMATION
ENGINE LACKS POWER
Inspection/Adjustment
Start engine and
accelerate lightly for
observation
Check valve clearance
Test cylinder
compression
Check throttle body for
clogging
Remove spark plug and
inspect
Remove oil dipstick and
check oil level and
condition
Remove cylinder head
oil inspected bolt and
Inspect.
Check if engine
overheats
Rapidly accelerate or
run at high speed
Symptom
Engine speed
increases
Correct
Normal
compression
Not Clogged
Plug not fouled or
discolored
Correct and not
contaminated
Valve train
lubricated properly
Engine does not
overheats
Engine does not knock
Engine speed does
not increase
sufficiently
Incorrect
Abnormal
compression
Clogged
Plug fouled or
discolored
Incorrect or
contaminated
Valve train not
lubricated properly
Engine overheats
Engine knocks
DINK 200i/125
Probable Cause
c Clogged air cleaner
d Faulty fuel pressure regulator
e Clogged exhaust muffler
f Faulty fuel pressure regulator
g Faulty fuel pump
c Improper valve clearance
adjustment
d Worn valve seat (valve stem
too protruding)
c Improper valve and seat
contact
d Worn cylinder and piston
rings
e Blown cylinder head gasket
f Flaws in cylinder head
g Improper valve timing
Throttle body clogged or
Air cleaner clogged
c Fouled spark plug
d Incorrect heat range plug
c Oil level too high
d Oil level too low
e Oil not changed
c Clogged oil passage
d Faulty oil pump
c Insufficient coolant
d Faulty thermostat
e Worn cylinder and piston
rings
f Mixture too lean
g Poor quality fuel
h Excessive carbon buildup in
combustion chamber
c Excessive carbon buildup in
combustion chamber
d Poor quality fuel
e Mixture too lean
f Clutch slipping
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