Benelli TNT125 Service Manual

Throttle Body
Working Principle of Throttle Body:
Throttle body assembly mainly consists of the
following components: main casting valve,
bearing, shaft and valve plate, return spring,
throttle wire part, throttle position sensing system,
and bypass air volume control system. All of the
above subsystems work together to meet the
requirements for following functions:
 Intake flow control
 Control of air flow at idle speed
 Throttle position detection – provide
throttle opening feedback signal for engine
control system
Throttle
body position sensor provides ECU
with throttle opening; the stepper motor at throttle
body maintains the idle speed of engine near the
target idel speed required by ECU;
Appearance of Throttle Body:
Technical Parameters
Throttle Body:


- 154 -
28mm inner diameter
maximum flow: ≥50g/s@2.7kPa vacuum
Breakaway torque of throttle body:
Idle speed state: 0.12±0.03 N•m
Full opening: 0.32±0.05N•m

Benelli TNT125 Specifications

General

Displacement	125 cc
Transmission	5-speed
Fuel System	EFI
Fuel Capacity	7.2 liters
Seat Height	780 mm
Dry Weight	116 kg
Bore x Stroke	54 mm x 54.5 mm
Starting System	Electric
Wheelbase	1215 mm
Engine Type	Single cylinder, 4-stroke, air-cooled
Front Suspension	Upside-down fork
Front Brake	Single disc
Rear Brake	Single disc
Front Tire	120/70-12
Rear Tire	130/70-12
Max Power	8.2 kW (11.1 Cv) @ 9500 rpm
Rear Suspension	Swing arm with lateral shock absorber with adjustable spring preload