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Chapter III Electronic Fuel Injection System

(EFI)

Contents

- 118 -

Introduction to EFI .................................................................................................................................... - 122 -

EFI System ................................................................................................................................................ - 123 -

EFI Part Position ........................................................................................................................................ - 125 -

Technical Parameters ................................................................................................................................. - 131 -

Fuel tank .................................................................................................................................................... - 133 -

Exploded View of Fuel Tank ............................................................................................................. - 133 -

Evaporative Emission Recovery System of Fuel ............................................................................... - 135 -

Disassembly of Fuel Tank .................................................................................................................. - 136 -

Check ................................................................................................................................................. - 138 -

Installatation of fuel tank ................................................................................................................... - 140 -

Notes for EFI Overhaul ............................................................................................................................. - 141 -

Notes for EFI Overhaul ..................................................................................................................... - 141 -

ECU ........................................................................................................................................................... - 143 -

Engine controller (MT05.2ECU) ....................................................................................................... - 143 -

ECU Appearance ............................................................................................................................... - 143 -

ECU Disassembly .............................................................................................................................. - 143 -

ECU Installation ................................................................................................................................ - 144 -

Notes for ECU ................................................................................................................................... - 144 -

ECU Power Supply Requirements ..................................................................................................... - 144 -

ECU Temperature Requirements ....................................................................................................... - 145 -

Fuel pump .................................................................................................................................................. - 146 -

Working of Fuel Pump ....................................................................................................................... - 146 -

Appearance of Fuel Pump.................................................................................................................. - 147 -

Composition of Fuel Pump ................................................................................................................ - 148 -

Label and Mark of Fuel Pump ........................................................................................................... - 148 -

Working Environment of Fuel Pump ................................................................................................. - 149 -

Fuel pump Maintenance Process ....................................................................................................... - 149 -

Safety Protection: ....................................................................................................................... - 149 -

Fault Diagnosis of Fuel Pump Assembly: .................................................................................. - 150 -

Disassembly of Fuel Pump Assembly: ...................................................................................... - 150 -

Installation of Fuel Pump Assembly: ......................................................................................... - 151 -

Fuel Pressure Release Process: .................................................................................................. - 151 -

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

Benelli TNT125 Service Manual

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Benelli TNT125 Specifications

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