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Honda CRF450RX User Manual

Honda CRF450RX
79 pages
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This manual should be considered a permanent part of the vehicle
and should remain with the vehicle when it is resold.
This publication includes the latest production information available
before printing. Honda Motor Co., Ltd. reserves the right to make
changes at any time without notice and without incurring any
obligation.
No part of this publication may be reproduced without written
permission.
The vehicle pictured in this owner’s manual may not match your
actual vehicle.
© 2021 Honda Motor Co., Ltd.
20210720082450_42MKE6020_eng_BOOK Page 1 Tuesday, July 20 2021 08:26:26 JST
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Honda CRF450RX Specifications

General IconGeneral
Displacement449.7cc
Bore x Stroke96.0mm x 62.1mm
Compression Ratio13.5:1
Throttle Body46mm
Transmission5-speed
Final DriveChain
Front Suspension AdjustabilityFully adjustable
Rear SuspensionPro-Link Showa single shock
Rear Suspension AdjustabilityFully adjustable
Front BrakeSingle 260mm disc with twin-piston caliper
Rear BrakeSingle 240mm disc
Front Tire80/100-21
Wheelbase58.3 inches
Seat Height37.8 inches
Ground Clearance12.9 inches
Fuel Capacity2.1 gallons
Engine TypeSingle-cylinder four-stroke
Valve TrainUnicam 4-valve
InductionProgrammed Fuel Injection (PGM-FI)
IgnitionCDI
Front Suspension49mm Showa® coil-spring fork

Summary

Important Notice

A Few Words About Safety

Vehicle Safety

Safety Guidelines

Follow guidelines to enhance safety, inspect vehicle, stop engine before fueling, and avoid enclosed areas.

Safety Labels

Labels provide important safety information and warn of hazards. Read and do not remove them.

Image Labels

Describes the meaning of various labels found on the vehicle.

Safety Precautions

Ensure wearing of approved helmet, eye protection, and protective apparel for safe riding.

Riding Precautions

Guidelines for running-in period, parking, and refuelling the vehicle.

Accessories & Modifications

Advises against installing non-Honda accessories and making unauthorized modifications.

Operation Guide

Parts Location

Identifies key parts of the vehicle with labels for easy recognition.

Indicators

Explains the function and meaning of various indicator lamps on the vehicle.

Switches

Details the location and function of various control switches on the handlebars.

Honda Selectable Torque Control

Explains how to select and use the vehicle's selectable torque control system.

HRC-Launch Control System

Describes the HRC-Launch Control System for effective race starts.

Starting the Engine

Provides step-by-step procedures for starting the engine in various conditions.

Shifting Gears

Explains the 5-speed gear pattern and how to shift gears.

Refuelling

Details the process and precautions for refuelling the vehicle's fuel tank.

Maintenance

Importance of Maintenance

Emphasizes safety, performance, and protecting investment through regular vehicle maintenance.

Maintenance Schedule

Lists recommended inspection and service intervals for vehicle upkeep.

Maintenance Fundamentals

Covers essential pre-ride inspections and basic between-ride maintenance tasks.

Troubleshooting

Engine Will Not Start

Addresses issues when the starter operates but the engine does not, or the starter does not operate.

Warning Indicators On or Flashing

Explains the PGM-FI malfunction indicator lamp (MIL) and its implications.

Electrical Trouble

Covers common electrical issues like a dead battery or blown fuse.

Information

Caring for Your Vehicle

Provides guidelines for washing, cleaning, polishing, and frame maintenance.

Storing Your Vehicle

Instructions for properly preparing and storing the vehicle for extended periods.

Transporting Your Vehicle

Guidelines and precautions for safely transporting the vehicle.

You & the Environment

Discusses responsible vehicle use, sensible cleaners, and waste disposal.

Serial Numbers

Explains the importance and location of frame and engine serial numbers.

Fuels Containing Alcohol

Details acceptable fuel blends and potential issues with high ethanol content.

Specifications

Dimension

Lists the key physical dimensions of the vehicle.

Frame

Provides frame-related specifications including tyre size and pressure.

Engine

Details engine specifications such as bore, stroke, compression ratio, and oil capacity.

Cooling System

Specifies the recommended coolant type and capacity for the vehicle.

Drive Train

Lists gear ratios, primary reduction, and final reduction details.

Electrical

Covers electrical components like battery, spark plugs, and fuses.

Torque Specifications

Lists essential torque values for various bolts and components.

Manufacturer, Authorized Representative and Importer

Provides contact and address information for Honda and its representatives.

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