Benelli TNT125 Service Manual

Oxygen Sensor
Working Principle of Oxygen Sensor
Oxygen sensor can be used to detect the oxygen
content in the waste gas of engine exhaust pipe for
internal fuel closed loop control of ECU, thus
maintaining engine combustion at the most reasonable
state of air and fuel ratio (14.7).
Appearance of Oxygen Sensor
See the figure below
Technical Parameters
 Partially thick limit of air-fuel ratio: ＞750
mVDC
 Partially thin limit of air-fuel ratio: ＜120
mVDC
 Power of oxygen sensor heater: 7.0W
(The above parameters are measured at
engine bench, the working conditions: exhaust
gas temperature: 450°C; duty cycle: 70%;
10Hz; voltage: 13.5V).
 The resistance of heater is: 9.6±1.5Ω (measured at
21°C)
 Operating temperature range: 260-850°C
Installation Requirements
 Installation angle (angle with the horizontal
plane): ≥10 degrees
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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