ST4 (2003)

Motor
Tipo
L-Twin cylinder, 4 valve per cylinder Desmodromic; liquid cooled
Cilindrada
916cc
Diámetro x carrera
94x66mm
Ratio de compresión
11:1 
Potencia
103hp - 76kw @ 9500rpm
Par motor
8.6kgm - 84Nm @ 7500rpm
Inyección de combustible
Marelli electronic fuel injection, 50mm throttle body
Escape
2 aluminum mufflers with 3-way catalytic converter (non-catalytic for USA version)
Transmisión
Caja de cambios
6 speed
Transmisión primaria
Straight cut gears, ratio 1.84
Relación de transmisión
1st 37/15, 2nd 30/17, 3th 27/20, 4th 24/22, 5th 23/24, 6th 24/28
Transmisión secundaria
Chain; Front sprocket 15; Rear sprocket 43
Embrague
Dry multiplate with hydraulic control
Parte ciclo
Chasis
Tubular steel trellis
Suspención delantera
Showa 43mm upside-down fully adjustable fork
Rueda delantera
3-spoke light alloy, 3.50x17
Neumático delantero
120/70 ZR17
Suspención trasera
Progressive linkage with fully adjustable Sachs monoshock
Rueda trasera
3-spoke light alloy 5.50 x 17
Neumático trasero
180/55 ZR17
wheel-travel-front
130mm / 5.1in
wheel-travel-rear
148mm / 5.8in
Freno delantero
2 x 320 mm semi-floating discs, 4-piston caliper
Freno trasero
245mm disc, 2-piston caliper
Instrumentación
Speedometer, rev counter, tripmeter, neutral light, oil pressure warning light, low fuel warning light, high beam indicator, turns signals, LCD display with clock, water temperature, fuel level
Dimensiones y peso
Peso en seco
215kg / 474lb
Altura asiento
820mm / 32.8in
Distancia entre ejes
1430mm / 56.3in
Ángulo de lanzamiento
24°
Capacidad del depósito
21l (of which 6l reserve) / 5.5 US gal (of which 1.5 US gal reserve)
Número de plazas
Na
Garantía y mantenimiento
Garantía
2 years unlimited mileage
Emisiones y consumos
Homologación
Emissions are in compliance with Euro1 standard regulations and are also expected to comply with Euro2 regulations, which have still not been defined. (Except for USA version)