KYMCO GRAND DINK 125 User Manual

1. GENERAL INFORMATION
1-19
GRAND DINK 125/150
ENGINE LACKS POWER
ÅClogged air cleaner
ÇRestricted fuel flow
ÉClogged fuel line between fuel
tank and carburetor
ÑClogged exhaust muffler
ÖFaulty auto bystarter
ÜSplit carburetor vacuum piston
diaphragm
ÅFaulty CDI unit
ÇFaulty A.C. generator
ÅImproper valve clearance
adjustment
ÇWorn valve seat (valve stem too
protruding
ÅImproper valve and seat contact
ÇWorn cylinder and piston rings
ÉBlown cylinder head gasket
ÑFlaws in cylinder head
ÖImproper valve timing
ÅClogged carburetor jets
ÅFouled spark plug
ÇIncorrect heat range plug
ÅOil level too high
ÇOil level too low
ÉOil not changed
ÅClogged oil pipe
ÇFaulty oil pump
ÅInsufficient coolant
ÇFaulty thermostat
ÉWorn cylinder and piston rings
ÑMixture too lean
ÖPoor quality fuel
ÜExcessive carbon buildup in
combustion chamber
áIgnition timing too early
àAir in cooling system
ÅExcessive carbon build-up in
combustion chamber
ÇPoor quality fuel
ÉClutch slipping
ÑMixture too lean
Ö Ignition timing too early
Start engine and accelerate
lightly for observation
Inspection/Adjustment
Symptom
Probable Cause
Engine speed
increases
Correct timing
Engine speed does
not increase
sufficiently
Incorrect timing
Check ignition timing
(using a timing light)
Test cylinder compression
Check carburetor for
clogging
Rapidly accelerate or run
at high speed
Remove spark plug and
inspect
Check if engine overheats
Check valve clearance
Correct
Incorrect
Normal
compression
Abnormal
compression
Not Clogged
Clogged
Remove oil dipstick and
check oil level and condition
Remove cylinder head oil
pipe bolt and inspect
Engine overheats
Engine does not
overheats
Plug not fouled or
discolored
Plug fouled or
discolored
Correct and not
contaminated
Incorrect or
contaminated
Valve train lubricated
properly
Valve train not
lubricated properly
Engine does not knock
Engine knocks

KYMCO GRAND DINK 125 Specifications

General

Displacement	124.6 cc
Transmission	CVT
Front Suspension	Telescopic fork
Front Brake	Disc
Rear Brake	Drum
Seat Height	780 mm
Starting System	Electric
Cooling System	Liquid-cooled