EN - 4
TECHNICAL DATA
ENGINE
Type .....................single cylinder, 4 stroke
Cooling liquid with electric fan
Water radiators .............................n° 2
Bore .................................... 2,28 in.
Stroke ...................................1,85 in.
Displacement ...........................7,61 in3.
Compression ratio ..........................12,8:1
Starting .................................electric
TIMING SYSTEM
Type ..........double overhead camshaft; 4 valve
Intake ..........................0,002 ÷ 0,004 in.
Exhaust ........................0,006 ÷ 0,008 in.
LUBRICATION
Type ...................dry sump with lobe pump
and cartridge filter
IGNITION
Type ..............Electronic, inductive discharge,
with adjustable advance (digital control)
Spark plug type ......................“NGK” CR8E
Spark plug gap ..........................0,031 in.
FUEL SYSTEM
Type .....................Electronic injection feed
Throttle body ...........................ø 1,26 in.
PRIMARY DRIVE
Drive pinion gear- Clutch ring gear .......Z 20- Z 67
Transmission ratio ..........................3,35
CLUTCH
Type .........................multidisc in oil bath
with mechanical control
No. of conducting discs .........................5
No. of conducted discs ..........................4
TRANSMISSION
Type ...................constant mesh gear type
No. of gears ..................................6
Transmission ratio
1st gear ...........................2,833 (z 34/12)
2nd gear ..........................2,066 (z 31/15)
3rd gear ...........................1,555 (z 28/18)
4th gear ...........................1,238 (z 26/21)
5 th gear ..........................1,045 (z 23/22)
6 th gear ......................... 0,916 (z 22/24)
SECONDARY DRIVE
Gearbox outlet pinion - rear crown
RS .....................................Z 14- Z 58
SM ...................................Z 14- Z 54
Transmission ratio
RS ........................................ 4,142
SM .......................................3,857
TRANSMISSION CHAINE
Brand and type ............ “REGINA” 126RSHB-12.7
FRAME
Type ..................single beam, double cradle
in high-strength steel tubes;
rear frame in steel
FRONT SUSPENSION
Type .........”Upside-down” telescopic hydraulic
front fork with advanced axle ;
stanchions tubes Ø 1,61 in.
Legs axis stroke .........................9,84 in.
REAR SUSPENSION
Type ...................progressive “SOFT DAMP”
with hydraulic single shock absorber
Wheel stroke ............................9,84 in.
FRONT BRAKE
Type .......fixed disc RS: Ø 10,23 in. - SM: Ø 11,81 in.
with hydraulic control and floating caliper
REAR BRAKE
Type .................floating disc, Ø 8,66 in. with
hydraulic control and floating caliper
RIMS
Front (RS) ....................in light alloy: 1,6x21”
Front (SM) .................. in light alloy: 2,75x17”
Quick RS-SM_125_MY16_ed00_11-2016_CodA000P01895.indd 4 15/12/16 12:40