Husqvarna WR 125 2008, Workshop Manual

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N° 8000 B0503 (06-07)
A.6
ENGINE
Single-cylinder, two-stroke engine, with lamellar suction in the
crankcase and mechanical control H.T.S. valve on the exhaust
system.
Bore ...........................................................54 mm/2.12 in.
Stroke......................................................54,5 mm/2,14 in.
Capacity ........................................124,82 cm
3
/7.61 cu.in.
Compression ratio (with closed ports) ............................8,8:1
FUEL FEEDING
Intake setting by lamellar valve.
DISTRIBUTION DIAGRAM
TRANSFER: ................................................................128°
EXHAUST: .................................................................184°
Carburetor ........................................................Mikuni TMX 38
LUBRICATION
ENGINE
4% (1:25) of oil-gasoline mix (during running) NOT LESS than
3% (1:33)when running is over.
SHIFTING and MAIN TRANSMISSION
Through the oil contained in the engine block.
COOLING
With liquid circulation through a pump. Two radiators are pro-
vided in the thermal assembly front.
IGNITION
Capacity discharge electronic ignition with variable advance;
analogic for WR125, and digital for CR 125.
Make ................................................................KOKUSAN
Ignition advance (piston stroke before T.D.C.)
WR ..............................................1,2 mm/0.047 in.(15°)
CR ...........................................0,08 mm/0.0031 in. (4°)
Spark plug ........................ Champion QN 84 or NGK BR9 EG
Electrode gap .........................................0,6 mm/0.0236 in.
STARTING
Kick-start.
TRANSMISSION
Cluster constant-mesh gears.
Primary ratio ...........................................Z 22/71= 1:3,227
Gear ratios
1st ..............................................................Z 14/33=1:2,357
2nd ............................................................Z 15/28=1:1,866
3rd ............................................................Z 19/30=1:1,579
4th..............................................................Z 20/27=1:1,350
5th..............................................................Z 22/26=1:1,181
6th..............................................................Z 21/21=1:1,000
Finale drive ratio ..........................................Z 13/50=1:3,846
Gearing chain
(CR 125)........REGINA 135 RX -5/8”x1/4”
or D.I.D. 520-DS 5/8”x1/4”
(WR 125) ................REGINA 135 ORN-A
or D.I.D. 520 V6
Total ratios
1st ........................................................................29,258
2nd
................................................................................
23,170
3rd
................................................................................
19,599
4th
..................................................................................
16,757
5th
..................................................................................
14,669
6th
..................................................................................
12,412
Oil-bath multi-disc clutch type.
BRAKES
Front brake
Perforated fixed disc with hydraulic control and floating caliper.
Disc diameter..................................................260 mm/10.23 in.
Brake caliper.................................................................BREMBO
Pad area ..................................................33,4 cm2/5.18 sq.in.
Rear brake
Perforated floating disc with hydraulic control and floating caliper.
Disc diameter...................................................240 mm/ 9.45 in.
Brake caliper.................................................................BREMBO
Pad area..................................................23,5 cm2/3.64 sq. in.
FRAME
Single beam with closed twin cell, made of high strenght stainless
steel tubes. Made up o rectangular and square high tensile steel
tubes.
Steering angle...............................................................43° each
Steering axis angle ................................................................25°
Front fork caster ..........................................104 mm/4.1 in. (WR)
107 mm/4.21(WR)
SUSPENSIONS
Front suspension
Telescopic-hydraulic up-side down fork with led pin, adjustable in
compression and rebound.
Producer.................................................................MARZOCCHI
Legs diameter......................................................45 mm/1.77 in.
Front wheel bulb position
(on the sliding axis)............................................300 mm/11.8 in.
Rear suspension
Light alloy swinging fork with progressive leverage suspensions
(SOFT DAMP system) and hydraulic single-damper with helical
spring. The hydraulic brake compression (double), extension, and the
spring preload can be adjusted.
Damper make .................................................................SACHS
Rear wheel vertical travel....................................320 mm/12.6 in.
WHEELS
Light alloy front rim.
Manufacturer and type.......................................TAKASAGO Excel
Dimensions.................................................................1,60"x21"
Light alloy
rear rim.
Manufacturer and type.......................................TAKASAGO Excel
Dimensions ................................2,15"x19" (CR); 2,15”x18” (WR)
TYRES
Front
Make .............................“Pirelli” (CR); “Michelin” or “Pirelli” (WR)
Type................................................................51R-MT 32A (CR);
Enduro Competition 3 or MT83 Scorpion (WR)
Dimensions .............................80/100-21” (CR); 90/90-21” (WR)
nflation pressure (cold) (CR)...........0,9÷1,0 Kg/cm2- 12.8÷14.2 psi
(*) Inflation pressure (cold) (WR) ....................0,9÷1,0 Kg/cm2- 12.8÷14.2 psi
(**) Inflation pressure (cold) (WR...................1,1 Kg/cm2- 15.6 psi
Rear
Make .............................. “Pirelli” (CR); “Michelin” or “Pirelli”(WR)
Type ........................................................NHS (57) - MT 32 (CR);
Enduro Competition 3 or MT83 Scorpion (WR)
Dimensions ...........................100/90-19” (CR); 120/90-18” (WR)
Inflation pressure (cold) (CR) ..........0,8÷0,9 Kg/cm2- 11.4÷12.8 psi
(*) Inflation pressure (cold) (WR) ....0,8÷0,9 Kg/cm2- 11.4÷12.8 psi
(**) Inflation pressure (cold) (WR) ...................1,0kg/cm2- 14.2 psi
GENERAL
(*): Racing use
(**): Road use
A-125-2008 20-06-2007 16:40 Pagina 6