PIAGGIO 500 cc Service Manual page 6

Specifications (500 cc 4-stroke, 4-valves H
gine)
ENGINE
Type .................................... single-cylinder, 4-stroke
Bore ................................................................ 92 mm
Stroke ............................................................. 69 mm
Displacement ............................................... 460 cm
Compression ratio ......................................... 10.5 : 1
Timing ............................ chain-operated overhead sin-
Valves play: intake ...................................... 0.20 mm
exhaust ................................... 0.20 mm
Valves play
adjustment ................ threaded register on equalizers
Idle speed ............................................. 1450±50 rpm
CO% value .................................................... 1±1.5%
Starting system ................................... electric starter
Lubrication ...................... trochoid pump (inside the
Lubrication pressure .......................................... 4 bar
Minimum allowed pressure (at 100°C) ........... 0.8 bar
Fuel system .................... electronic injection with elec-
Max power
(at crankshaft) .............. 29 kW (39 CV) bei 7250 rpm
Max torque
(at crankshaft) ............ 40 N·m (4 Kgm) bei 5500 rpm
0 en-
2
gle-shaft flywheel side, inte-
grated phonic wheel, 4-
valves and automatic start-
ing valve lifter
0.15mm
0.15mm
crankcase), oil filter and pres-
sure adjustment by-pass
tric fuel pump, throttle body
Ø 38mm and single injector
General information and Maintenance
Cooling system ............... liquid, by means of motor-
3 Transmission .................. automatic speed variator by
Ignition type .................... high efficiency inductive type
Spark advance
(before T.D.C.) ............... variable controlled by injec-
Spark plug ............................... CHAMPION RG 6 YC
Engine-wheel ratio ............................ short: 1/11.988
Engine oil ....................... SAE 5W/40 exceeding API
Quantity ........................................................... ~ 1.7 l
Hub oil ............................................... TUTELA ZC 90
Quantity ............................................................ 250cc
Cooling system capacity ................................. ~ 1.8 l
ized pump, 3-way thermo-
stat and electric fan.
means of expanding pulleys,
V-belt, automatic clutch, re-
duction gear, and transmis-
sion compartment cooling by
air forced-circulation.
integrated with injection, vari-
able spark advance and
separated high voltage coil
tion power unit
NGK CR7 EKB
long: 1/ 4.86
SJ specifications
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