
2
. GENERAL INFORMATION
2-37
VITALITY 50
ENGINE LACKS POWER
Clogged air cleaner
Restricted fuel flow
Clogged fuel tank cap breather hole
Clogged exhaust muffler
Faulty auto bystarter
Split carburetor vacuum piston
diaphragm
Faulty auto fuel valve
Faulty CDI unit
Faulty pulser coil
Improper valve clearance
adjustment
Worn valve seat (valve stem too
protruding
Improper valve and seat contact
Worn cylinder and piston rings
Leaking cylinder head gasket
Improper valve timing
Clogged carburetor jets
Fouled spark plug
Incorrect heat range plug
Oil level too high
Oil level too low
Oil not changed
Clogged oil pipe
Faulty oil pump
Worn cylinder and piston rings
Mixture too lean
Poor quality fuel
Excessive carbon buildup in
combustion chamber
Ignition timing too early
Excessive carbon build-up in
combustion chamber
Poor quality fuel
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
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
Not clogged
Clogged
Содержание Vitality 50
Страница 20: ...2 GENERAL INFORMATION 2 15 VITALITY 50 WIRING DIAGRAM 2 STROKE ...
Страница 21: ...2 GENERAL INFORMATION 2 16 VITALITY 50 WIRING DIAGRAM 4 STROKE ...
Страница 47: ...2 GENERAL INFORMATION 2 42 VITALITY 50 Faulty ignition coil ...
Страница 66: ...4 LUBRICATION SYSTEM 4 1 VITALITY 50 LUBRICATION SYSTEM 2 STROKE ...
Страница 67: ...4 LUBRICATION SYSTEM 4 2 VITALITY 50 4 STROKE Oil Pump Oil Filter Screen Crankshaft Rocker Arm Shaft ...
Страница 92: ...6 4 STROKE CYLINDER HEAD VALVES 6 1 VITALITY 50 ...
Страница 107: ...7 CYLINDER HEAD 2 STROKE CYLINDER PISTON 7 1 VITALITY 50 2 STROKE Torque 1 0 1 2kg m Torque 1 1 1 7kg m cold ...
Страница 108: ...7 CYLINDER HEAD 2 STROKE CYLINDER PISTON 7 2 VITALITY 50 4 STROKE ...
Страница 126: ...8 A C GENERATOR 8 1 VITALITY 50 Torque 3 5 4 0kg m Torque 0 8 1 2kg m Torque 0 6 1 0kg m Torque 0 8 1 2kg m ...
Страница 150: ...10 FINAL REDUCTION 10 1 VITALITY 50 ...
Страница 159: ...11 CRANKCASE CRANKSHAFT 11 1 VITALITY 50 2 STROKE Torque 0 8 1 2kg m ...
Страница 160: ...11 CRANKCASE CRANKSHAFT 11 2 VITALITY 50 4 STDROKE ...
Страница 173: ...12 CARBURETOR 12 1 VITALITY 50 ...
Страница 259: ...16 ELECTRICAL EQUIPMENT 16 17 VITALITY 50 ELECTRIC STARTER Starter Motor Starter Relay ...
Страница 263: ...16 ELECTRICAL EQUIPMENT 16 21 VITALITY 50 ...
Страница 275: ...18 SPECIFICATIONS 18 1 4 STROKE ...