A.3
GENERAL INFORMATION
Ed. 05-2011
ENGINE
Type .............................................................................. single cylinder, 2 stroke
Cooling ...................................................................................................... liquid
Bore ......................................................................................... mm 54 (2.12 in.)
Stroke ................................................................................... mm 54,5 (2.14 in.)
Displacement .............................................................. cm
3
124,82 (7.61 cu. in.)
Compression ratio (with closed ports) ........................................................8,8:1
STARTING
Type..................................................................................................... kick start
TIMING SYSTEM
Type ................................................. reed valve at intake in the crankcase and
H.T.S. valve with mechanical control at the exhaust
LUBRICATION
Motore ..................................................................................... by electric pump
Primary drive transmission/Gearbox ...... by the oil contained in the crankcase
IGNITION
Type .......... ............................................................................... electronic C.D.I.
Spark plug type..............................................CHAMPION QN 84/NGK BR9EG
Spark plug gap ................................................................... 0,6 mm (0.0236 in.)
FUEL SYSTEM
Type ............................................................ Carburettor DELL’ORTO VHST 28
Venturi diameter ...................................................................... mm 28 (1.10 in.)
High speed jet...............................................................................................142
Low speed jet ................................................................................................38
Starting jet .....................................................................................................60
Main nozzle ........................................................................................... HN 268
Floater ........................................................................................................g 6,5
Throttle valve ..................................................................................................55
Metering pin ................................................................................................D 48
Metering pin slot ......................................................................................2nd (*)
Idle mixture adjusting screw .............................................................1+1/2 turns
PRIMARY DRIVE
Drive pinion gear ....................................................................................... Z 22
Clutch ring gear .......................................................................................... Z 72
Transmission ratio .....................................................................................3,272
CLUTCH
Type .........................................oil bath multiple disc clutch, mechanical control
TRANSMISSION
Type ............................................................................ constant mesh gear type
Transmission ratio
1st gear. .....................................................................................2,692 (Z 35/13)
2nd gear ....................................................................................1,800 (Z 27/15)
3rd gear ....................................................................................1,333 (Z 24/18)
4th gear......................................................................................1,100 (Z 22/20)
5 th gear.....................................................................................0,954 (Z 21/22)
6 th gear ....................................................................................0,869 (Z 20/23)
(*): with washer between retainer and throttle valve
Summary of Contents for 2011 SMS 125
Page 1: ...Workshop Manual WRE 125 2011 SMS 125 2011 Ed 05 2011 ...
Page 6: ......
Page 7: ...b 1 b IMPORTANT NOTICES Ed 05 2011 Section ...
Page 9: ...A 1 A GENERAL INFORMATION Ed 05 2011 Section ...
Page 16: ......
Page 17: ...B 1 B MAINTENANCE Ed 05 2011 Section ...
Page 20: ......
Page 21: ...C 1 C TROUBLESHOOTING Ed 05 2011 Section ...
Page 27: ...D 1 D SETTINGS AND ADJUSTMENTS Ed 05 2011 Section ...
Page 54: ......
Page 55: ...E 1 E GENERAL PROCEDURES Ed 05 2011 Section ...
Page 83: ...F 1 F ENGINE DISASSEMBLY Ed 05 2011 Section ...
Page 100: ......
Page 101: ...G 1 G ENGINE OVERHAUL Ed 05 2011 Section ...
Page 124: ......
Page 125: ...H 1 H ENGINE ASSEMBLY Ed 05 2011 Section ...
Page 142: ......
Page 143: ...I 1 I FRONT SUSPENSION Ed 05 2011 Section ...
Page 145: ...I 3 H02628 WRE 125 H02629 SMS 125 H02630 SMS 125 H02631 SMS 125 FRONT SUSPENSION Ed 05 2011 ...
Page 154: ......
Page 155: ...J 1 J REAR SUSPENSION Ed 05 2011 Section ...
Page 163: ...L 1 L BRAKES Ed 05 2011 Section ...
Page 175: ...M 1 M ELECTRICAL SYSTEM Ed 05 2011 Section ...
Page 178: ...M 4 ELECTRICAL SYSTEM Ed 05 2011 ...
Page 216: ......
Page 217: ...N 1 N ENGINE COOLING Ed 05 2011 Section ...
Page 222: ......
Page 223: ...W 1 W SPECIAL TOOLS Ed 05 2011 Section ...
Page 230: ......
Page 231: ...Y 1 Y CHASSIS AND WHEELS Ed 05 2011 Section ...