Specifications (500 cc 4-stroke, 4-valves H2 0 engine)
ENGINE
Type .............................................................................................................single-cylinder, 4 stroke
Bore.........................................................................................................................................92 mm
Stroke.......................................................................................................................................69 mm
Displacement........................................................................................................................460 cm3
Compressionratio....................................................................................................................10.5 : 1
Timing ..............................................................................................chain-operated overhead
single-shaft flywheel side, integrated phonic wheel, 4- valves and automatic starting valve lifter
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.
Starting system ............................................................................................................electric starter
Lubrication........................................... trochoid pump (inside the crankcase), oil filter and pressure
adjustment by-pass
Lubrication pressure.................................................................................................................. 4 bar
Minimum allowed pressure (at 100°C) ................................................................................... 0.8 bar
Fuel system ........................................................electronic injection with electric fuel pump, throttle
body Ø 38mm and single injector
Max power
(at crankshaft) ......................................................................................29 kW (39 CV) bei 7250 rpm
Max torque
(at crankshaft) .................................................................................... 40 N·m (4 Kgm) bei 5500 rpm
Cooling system.................... liquid, by means of motorized pump, 3-way thermostat and electric
fan.
Transmission .............................automatic speed variator by means of expanding pulleys, V-belt,
automatic clutch, reduction gear, and transmission compartment cooling by air forced-circulation.
Ignition type .................... high efficiency inductive type integrated with injection, variable spark
advance and separated high voltage coil
Spark advance
(before T.D.C.) ............... variable controlled by injection
power unit
Spark plug .............................................................................CHAMPION RG 6 YC NGK CR7 EKB
Engine-wheel ratio ............................................................................. short: 1/11.988 long: 1/ 4.86
Engine oil ................................................................................................SAE 5W/40 exceeding API
SJ specifications
Quantity ……………………….................................................................................................. ~ 1.7 l
Hub oil........................................................................................................................TUTELA ZC 90
Quantity ....................................................................................................................................250cc
Cooling system capacity ........................................................................................................... ~ 1.8