Honda CRF450R [2017-2020]: A Motocross Legend Revisited

When Honda introduced the CRF450R for the 2017 model year, it wasn’t just another update—it was a statement. This generation (2017–2020) refined Honda’s motocross philosophy with a focus on agility, explosive power, and rider-friendly engineering. After throwing a leg over a well-maintained 2019 example, it’s clear why this bike remains a benchmark in the 450cc class. Let’s dive into what makes this machine tick—and why it still turns heads at the track today.

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Overview: The Big Red Machine

The CRF450R is Honda’s answer to the relentless demands of competitive motocross. Weighing in at 112 kg (247 lbs) ready-to-ride, it strikes a balance between raw power and flickable maneuverability. The standout feature? Its 449.7cc liquid-cooled single-cylinder engine, which delivers a visceral riding experience that’s equally at home on tight SX circuits or open outdoor tracks.

Visually, the bike is unmistakably Honda—aggressive red plastics, minimalist bodywork, and a chassis that looks like it’s carved from solid aluminum. The 37.8-inch (960 mm) seat height might intimidate shorter riders, but once moving, the CRF450R feels surprisingly approachable.

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Engine Performance: Controlled Fury

Power Delivery

The heart of the CRF450R is its 53 HP (38.7 kW) engine, peaking at 9,000 RPM. What’s remarkable isn’t just the numbers—it’s how Honda delivers that power. The PGM-FI fuel injection (introduced in later models) provides crisp throttle response, eliminating the bogging issues that plagued earlier carbureted versions.

• Low-end grunt: Torque peaks at 48 Nm (35.4 lb-ft) at 7,000 RPM, letting you tractor out of corners without excessive clutch work.
• Midrange punch: The engine comes alive between 6,000–8,000 RPM, pulling hard enough to loft the front wheel in third gear.
• Top-end scream: While not as frenetic as some European rivals, the CRF450R rewards riders who rev it out, especially on fast straights.

The 5-speed transmission is slick-shifting, though some test riders noted a preference for aftermarket shift levers for better boot clearance. The clutch—a wet multi-plate design—handles abuse gracefully, even during aggressive starts.

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Chassis & Handling: Precision Meets Poise

Frame & Suspension

Honda’s aluminum twin-spar frame is the backbone of this bike’s handling. Paired with Showa suspension—49mm inverted forks up front and a Pro-Link rear shock—the CRF450R soaks up braking bumps and landings with race-ready composure.

• Front suspension: 12.0 inches (305 mm) of travel, adjustable for compression/rebound.
• Rear suspension: 12.3 inches (312 mm) of travel, tunable for preload and damping.

The setup leans slightly toward stability over ultra-sharp turn-in, making it forgiving for intermediate riders. At speed, the bike tracks straight through choppy terrain, but it’s agile enough to pivot through ruts.

Ergonomics

Standing at 37.8 inches (960 mm), the seat is tall but narrow, letting riders shift weight effortlessly. The handlebar bend feels neutral, and the footpegs are positioned for aggressive cornering attacks.

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Brakes & Wheels: Confidence Under Deceleration

• Front brake: A 240mm wave rotor gripped by a twin-piston caliper offers strong bite without being overly grabby.
• Rear brake: The single-piston setup provides predictable modulation for scrubbing speed before corners.

The Dunlop MX3S tires (80/100-21 front, 120/80-19 rear) are a perfect match for the chassis, offering tenacious grip on intermediate terrain.

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Competition: How Does It Stack Up?

The 450cc motocross class is fiercely competitive. Here’s how the CRF450R fares against its rivals:

1. Yamaha YZ450F (2018–2020)

• Pros: Softer suspension for trail riders, broader powerband.
• Cons: Heavier feel in tight corners; less precise throttle response.
• Honda’s Edge: Lighter steering and more aggressive midrange hit.

2. KTM 450 SX-F

• Pros: Electric starter, hydraulic clutch, and cutting-edge tech.
• Cons: Stiffer price tag for aftermarket parts; harsher seat foam.
• Honda’s Edge: The CRF’s chassis feels more planted at high speeds.

3. Kawasaki KX450

• Pros: Strong low-end torque, ergonomic grips.
• Cons: Heavier (118 kg/260 lbs), slower-revving engine.
• Honda’s Edge: Crisper handling and a livelier top-end.

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Maintenance: Keeping the Beast Alive

Ownership costs matter, and the CRF450R is relatively low-fuss if you stay proactive:

Key Tips:

1. Oil Changes: Use SAE 10W-30 (1.0L with filter). Swap every 10–15 hours for hard riding.
2. Air Filter: Clean after every ride—grit loves Honda’s downdraft intake. Upgrade to a twin-air filter for easier maintenance.
3. Valve Checks: Every 20–30 hours. Intake valves (0.10–0.16 mm / 0.004–0.006 in) tend to tighten first.
4. Chain & Sprockets: The stock 13T/49T combo wears quickly. Consider a DID 520ERT2 chain for longevity.
5. Cooling System: Flush with 50/50 water+ coolant annually. Overheating is rare but possible in technical trails.

MOTOPARTS.store Recommendations:

• NGK SILMAR9A-9S Spark Plugs: Stock replacements for consistent ignition.
• Brake Fluid: DOT 4 synthetic for consistent lever feel.
• Suspension Linkage Kits: Reduce play for sharper handling.

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Final Verdict: A Timeless Contender

The 2017–2020 CRF450R isn’t just a motocross bike—it’s a platform. Whether you’re a weekend warrior or a seasoned racer, its blend of power, handling, and Honda reliability makes it a compelling choice. While newer models have flashier tech, this generation remains a cost-effective way to own a slice of motocross royalty.

Ready to upgrade your CRF? MOTOPARTS.store has the gear to keep you ahead of the pack—from performance sprockets to grippy handlebars.

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Specifications sheet

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