KYMCO GRAND DINK 250 User Manual

1. GENERAL INFORMATION
1-18
GRAND DINK 250
ENGINE LACKS POWER
cClogged air cleaner
dRestricted fuel flow
eClogged fuel line between fuel
tank and carburetor
fClogged exhaust muffler
gFaulty auto bystarter
hSplit carburetor vacuum piston
diaphragm
cFaulty CDI unit
dFaulty A.C. generator
cImproper valve clearance
adjustment
dWorn valve seat (valve stem too
protruding
cImproper valve and seat contact
dWorn cylinder and piston rings
eBlown cylinder head gasket
fFlaws in cylinder head
gImproper valve timing
cClogged carburetor jets
cFouled spark plug
dIncorrect heat range plug
cOil level too high
dOil level too low
eOil not changed
cClogged oil pipe
dFaulty oil pump
cInsufficient coolant
dFaulty thermostat
eWorn cylinder and piston rings
fMixture too lean
gPoor quality fuel
hExcessive carbon buildup in
combustion chamber
iIgnition timing too early
jAir in cooling system
cExcessive carbon build-up in
combustion chamber
dPoor quality fuel
eClutch slipping
fMixture too lean
g Ignition timing too early
Start engine and
accelerate lightly for
observation
Inspection/Adjustment
Symptom
Probable Cause
Engine speed
increases
Correct timin
g
Engine speed does
not increase
sufficientl
y
Incorrect timin
g
Check ignition timing
(using a timing light)
Test cylinder compression
Check carburetor for
clogging
Rapidly accelerate or run
at hi
g
h s
p
eed
Remove spark plug and
ins
p
ec
t
Check if engine overheats
Check valve clearance
Correc
t
Incorrec
t
N
ormal
com
p
ression
Abnormal
com
p
ression
N
ot Clogged
Clogged
Remove oil dipstick and
check oil level and condition
Remove cylinder head oil
p
i
p
e bolt and ins
p
ec
t
Engine overheats
Engine does no
t
overheats
Plug not fouled o
r
discolored
Plug fouled or
discolored
Correct and no
t
contaminated
Incorrect o
r
contaminated
Valve train lubricated
p
ro
p
erl
y
Valve train not
lubricated
p
ro
p
erl
y
Engine does not knock
Engine knocks

KYMCO GRAND DINK 250 Specifications

General

Displacement	249.1 cc
Cooling System	Liquid-cooled
Fuel System	Electronic Fuel Injection
Transmission	CVT
Front Suspension	Telescopic fork
Rear Suspension	Dual shock absorbers
Front Brake	Disc
Rear Brake	Disc
Front Tire	120/70-12
Rear Tire	130/70-12
Seat Height	780 mm
Engine Type	4-stroke, Single-cylinder