Benelli TNT 300 / QJ300 Service Manual – PDF DOWNLOAD

Description

Benelli TNT 300 / QJ300 Service Manual  Engine, Chassis & Electrical Repair Guide – PDF DOWNLOAD

Description

⚙️ Overview

The Benelli TNT 300 / QJ300 Service Manual is the definitive guide for maintenance, diagnostics, and complete overhaul of this mid-range 300cc parallel-twin motorcycle. Produced by Qianjiang Motorcycle Co., Ltd., this document contains factory-level repair procedures, wiring diagrams, and adjustment data, ensuring top performance and safe operation.

It is indispensable for workshop professionals and owners performing engine repair, chassis alignment, or electrical fault diagnosis. Each section is organized systematically for clarity — from specifications and torque charts to advanced diagnostic procedures.

📑 Table of Contents 

1. General Information

• Introduction to TNT 300 / QJ300 model variants

• Safety rules and standard workshop practices

• Unit conversion tables and symbols legend

• Motorcycle identification data (VIN, engine number, etc.)

2. Specifications

• Engine specifications (Bore x Stroke: 65 x 45.2 mm, Compression Ratio: 11.5:1)

• Performance data and standard clearances

• Dimensions, weight, and fuel capacity (17L tank)

• Lubricant grades, tightening torques, and service intervals

3. Maintenance

• Periodic maintenance schedule (1,000–24,000 km intervals)

• Engine oil, coolant, and brake fluid replacement

• Chain adjustment and lubrication

• Valve clearance inspection (Intake: 0.10–0.15 mm, Exhaust: 0.20–0.25 mm)

• Battery charging and load testing procedures

4. Engine

• Complete engine disassembly and reassembly procedures

• Cylinder head removal and camshaft timing setup

• Crankshaft, piston, and clutch inspection

• Lubrication and cooling system circuits

• Fuel injection and throttle body synchronization

5. Fuel System

• Fuel pump and injector service

• Fuel pressure regulation

• Idle speed control and sensor inspection (TPS, MAP)

• Air filter replacement and intake manifold check

6. Transmission

• Gearbox component replacement

• Clutch assembly and release mechanism inspection

• Gear shift drum, forks, and bearing servicing

7. Chassis

• Frame dimensions and alignment points

• Steering head bearings and front fork overhaul

• Swingarm pivot lubrication and replacement

• Rear suspension shock absorber maintenance

• Brake system bleeding and disc inspection

8. Electrical System

• Full wiring diagrams and harness routing

• Battery, starter relay, regulator/rectifier test

• ECU diagnostic procedures and sensor pin-out

• Ignition coil and fuel injector resistance values

• Lighting, switchgear, and CAN-bus circuit overview

9. Troubleshooting

• Engine starting issues

• Irregular idle, misfire, and overheating diagnostics

• Electrical failure isolation using multimeter testing

• Error code interpretation and reset procedure

🧰 Technical Highlights

• Factory torque specifications for all fasteners

• Clear step-by-step photos and exploded-view diagrams

• Full electrical wiring diagram with labeled connectors

• Fuel system calibration and throttle synchronization data

• Diagnostic error code lists and ECU signal values

📄 Short File Details