2018 Honda CRF450RX Specifications

Name: 2018 Honda CRF450RX
Brand: Honda

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2018 Honda CRF450RX Overview

The 2018 Honda CRF450RX is an enduro / off-road motorcycle. Under the tank sits a Single cylinder, four-stroke engine running Single Overhead Cams (SOHC) valve actuation, a compression ratio of 13.5:1. The bore and stroke measures 96 x 62 mm. From a practical standpoint, the 2018 CRF450RX tips the scales at 116.6 kg, carries a 8.33-litre fuel tank, offers a seat height of 960 mm and spans a 1,476 mm wheelbase. Scroll down for the complete 2018 Honda CRF450RX spec sheet covering every technical detail from suspension travel to tyre sizes.

2018 CRF450RX - Pros & Cons

Strengths

Fuel injection: The fuel injection injection system delivers crisp throttle response and reliable cold starts regardless of altitude or temperature.

Considerations

Tall seat height: The 960 mm seat height will challenge shorter riders - tiptoeing at low speeds is something to factor into your decision.

Owner Experiences & Common Issues

Throttle response and fuelling

The fuel injection on the 2018 Honda CRF450RX is generally well-regarded. Some owners note a slight hesitation at small throttle openings when cold, which clears once the engine reaches operating temperature. A quick visual check of the injector connectors during routine servicing is good practice on higher-mileage examples.

Valve clearance checks

Single Overhead Cams (SOHC) engines should have valve clearances checked at the manufacturer's specified interval. Owners report that clearances can tighten over time on higher-mileage bikes, leading to slight ticking from the top end. Catching it early keeps the job simple and avoids more costly remediation.

CRF450RX - Buying & Maintenance Guide

What to check before buying

When inspecting a used 2018 Honda CRF450RX, start with the basics: check the service book for oil change frequency, inspect the chain and sprockets for wear, and look for oil seepage around the engine casings and rocker covers. A cold start test is invaluable - a well-maintained CRF450RX should fire up cleanly and settle to a smooth idle within a few seconds.

Oil and filter changes

Regular oil changes are the single most important maintenance task on any CRF450RX. Stick to the manufacturer's interval - typically every 6,000 km or once a year, whichever comes first. Always use the correct viscosity grade as specified in the owner's manual.

Fuel system care

The CRF450RX's fuel injection system is durable but benefits from quality fuel and the occasional use of a fuel-system cleaner additive. If the bike has been stored for more than three months, drain and replace the fuel to prevent varnish deposits in the injectors.

Valve clearance service

Check that valve clearances have been adjusted at the correct intervals on any used CRF450RX. This is a job many owners skip because the bike does not immediately feel wrong - but tight clearances accelerate valve seat wear. Ask for proof it has been done.

2018 Honda CRF450RX - Frequently Asked Questions

What engine does the 2018 Honda CRF450RX have?

The 2018 Honda CRF450RX is powered by a Single cylinder, four-stroke engine.

How much does the 2018 Honda CRF450RX weigh?

The 2018 Honda CRF450RX weighs 116.6 kg. This is the manufacturer's wet figure.

What is the fuel tank capacity of the 2018 Honda CRF450RX?

The 2018 Honda CRF450RX has a 8.33-litre fuel tank.

Is the 2018 Honda CRF450RX suitable for shorter riders?

The 2018 Honda CRF450RX has a seat height of 960 mm. This is towards the tall end of the spectrum and will require most riders under 175 cm to tiptoe at stops.

What brakes does the 2018 Honda CRF450RX have?

The 2018 Honda CRF450RX uses Single disc. Two-piston calipers. at the front and Single disc at the rear.

What tyre sizes does the 2018 Honda CRF450RX use?

The 2018 Honda CRF450RX runs 90/90-21 front and 120/90-18 rear tyres. A good selection of sport, touring and all-weather rubber is available in these sizes.

What fuel system does the 2018 Honda CRF450RX use?

The 2018 Honda CRF450RX uses Injection. Programmed Fuel Injection (PGM-FI), providing precise fuelling across the rev range and reliable cold-start behaviour.

Honda CRF450RX Spec Evolution

The Honda CRF450RX was produced across 7 model years (2017-2023). The table below highlights the key specifications that changed across the production run - useful whether you are comparing years or tracking down a specific variant.

Specification	2017	2018	2019	2020	2021	2022	2023
Wet Weight	118.4 kg / 261.0 lbs	116.6 kg / 257.0 lbs	116.6 kg / 257.0 lbs	115.7 kg / 255.0 lbs	113.9 kg / 251.0 lbs	113.9 kg / 251.0 lbs	113.9 kg / 251.0 lbs
Engine Detail	Titanium Intake Valves	38mm intake valve, titanium; 31mm exhaust, steel	38mm intake valve, titanium; 31mm exhaust, steel	38mm intake valve, titanium; 31mm exhaust, steel	38mm intake valve, titanium; 31mm exhaust, steel	-	-
Seat Height	960 mm / 37.8 in.	960 mm / 37.8 in.	960 mm / 37.8 in.	960 mm / 37.8 in.	965 mm / 38.0 in.	965 mm / 38.0 in.	965 mm / 38.0 in.
Fuel Capacity	8.33 litres / 2.20 gallons	8.33 litres / 2.20 gallons	8.52 litres / 2.25 US gallons	8.52 litres / 2.25 US gallons	7.95 litres / 2.10 US gallons	8.00 litres / 2.11 US gallons	8.00 litres / 2.11 US gallons
Ground Clearance (mm)	328 mm	328 mm	328 mm	328 mm	335 mm	336 mm	336 mm
Ground Clearance (in.)	12.9 inches	12.9 inches	12.9 inches	12.9 inches	13.2 inches	13.2 inches	13.2 inches
Comments	Model ID: CRF450RX.	Model ID: CRF450RX.	Model ID: CRF450RX.	Titanium fuel tank. Model ID: CRF450RX.	Model ID: CRF450RX.	3 ride modes. Model ID: CRF450RX.	Model ID: CRF450RX.
Bore x Stroke (mm)	96.0 x 62.0 mm	96.0 x 62.0 mm	96.0 x 62.0 mm	96.0 x 62.0 mm	96.0 x 62.0 mm	96.0 x 62.1 mm	96.0 x 62.1 mm