Technical Data - Husqvarna WR 250 2012 Caracteristicas - Uso - Mantenimiento

TECHNICAL DATA

ENGINE
Type single cylinder, 2 stroke
..............................................
Cooling
........................................................................
Bore
(250) ................................................2.61 in (66,4 mm)
Bore
(300) ...................................................2.83 in (72 mm)
Stroke
..........................................................2.83 in (72 mm)
Displacement 15.21 cu. in. (249,3 cm
(250) ...................
Displacement 17.87 cu. in. (293,1 cm
(300) ...................
Compression ratio
(with closed ports) WR 250 . . . . . . . . . . . . . . . . . . . . . . .8,4:1
(with closed ports) WR 300 . . . . . . . . . . . . . . . . . . . . . . .6,9:1
Starting
................................................................
TIMING SYSTEM
Type
.................................................lamellar valve on suction
H.T.S. valve with mechanical control on the exhaust
LUBRICATION
Engine . . . . . . . . . . . . . . . . . . . . 3% (1:32) of oil-gasoline mix
during running in; NOT LESS than 2% (1:50) when running in is
over
Primary drive transmission/Gearbox by the oil contained in the
crankcase
IGNITION
Type.. . . . . . . . . . . . . . . . electronic digital capacitor-discharge
type, with variable advance
Spark plug type . . . . . . . . . . . . . . . . . . . . . . . . . .NGK BR8EG
Gap . . . . . . . . . . . . . . . . .0.0236÷0.0275 in. (0,6 ÷ 0,7 mm)
MUM1_WR250-300_2012_GB.indd 7
FUEL SYSTEM
Type . . . . . . . . . . . . . . . . . . . . . Carburettor "Mikuni" TMX 38
Venturi diameter ..........................................1.49 in. (38 mm)
High speed jet ...................................................................380
liquid
High speed jet (250 USA) ..................................................430
High speed jet (300 USA) ..................................................420
Low speed jet ...................................................................17,5
) Low speed jet (250 USA) .....................................................40
3
)
3 Low speed jet (300 USA) .....................................................35
Starting jet ..........................................................................80
Main nozzle .............................................................R-8 (914)
Floater (n° 2) .................................................................g 6,1
kick start
Throttle piston ....................................................................5,0
Throttle piston (USA) ..........................................................4,0
Metering pin .......................................................... 6BFY43-74
Metering pin (300 USA) .........................................6GAY69-74
Metering pin slot ................................................................3^
Idle mixture adjusting screw .......................................... 1 + ½
PRIMARY DRIVE
Drive pinion gear- Clutch ring gear ......................... Z 27- Z 69
Transmission ratio .........................................................2,555
CLUTCH
Type oil bath multiple disc clutch, mechanical control
......
TRANSMISSION
Type........................................ constant mesh gear type
Transmission ratio
1st gear
.......................................................2,142 (z 30/14)
2nd gear
.....................................................1,750 (z 28/16)
3rd gear
......................................................1,437 (z 23/16)
4th gear
......................................................1,210 (z 23/19)
5 th gear
.....................................................1,053 (z 20/19)
SECONDARY DRIVE
Transmission sprocket- Rear wheel sprocket ............. Z 13- Z 48
Transmission ratio ..........................................................3,692
FINAL RATIOS
1st gear .......................................................................20,220
2nd gear ......................................................................16,513
3rd gear ......................................................................13,564
4th gear .......................................................................11,422
5th gear .........................................................................9,932
FRAME
Type............................... Steel single tube cradle (roud tubes);
light alloy rear frame.
FRONT SUSPENSION
Type..................."Upside-down" telescopic hydraulic front fork
with advanced axle (adjustable in compression and rebound
stroke); stanchions tubes Ø 1.89 in (48 mm).
Legs axis stroke
.......................................11.8 in. (300 mm)
REAR SUSPENSION
Type..............progressive with hydraulic single shock absorber
Wheel stroke
............................................12.6 in. (320 mm)
FRONT BRAKE
Type...........fixed disc Ø 10.23 in. (260 mm) "Wave" type with
hydraulic control and floating caliper
REAR BRAKE
Type....................................floating disc, ø 8.66 in. (220 mm)
with hydraulic control and floating caliper
EN - 7
12-05-2011 13:28:56