Honda celebrates 50 years of Motocross legends30/05/2022
The 23YM CRF450R marks 50 years since the arrival of Honda’s first motocrosser intended for all riders, not only racing teams. The five decades since have been marked by a number of technological leaps that have made the letters ‘CR’ and then ‘CRF’ synonymous with off-road performance. Here is a look back at just some of those major landmarks.
- CRF450R and CRF450RX benefit from HRC factory rider chassis set-up and engine changes that make them easier to ride faster, for longer
- New intake ports, air funnel, throttle body, valve timing and ECU settings deliver over 10% more torque @ 5,000rpm and extra, smoother power at low rpm
- New rear muffler now made of tougher aluminium, with no extra weight
- Revised frame rigidity matched to new, shock setting deliver extra traction and drive; 49mm Showa forks also feature revised damping
- 23YM CRF450R 50th Anniversary marks half a century of Honda’s MX journey
- Striking new 23YM graphics include brand new HRC logo
The new 23YM CRF450R, CRF450R 50th Anniversary and CRF450RX headline the latest round of updates to Honda’s multi championship winning off-road family. HRC rider feedback from the FIM World MXGP, AMA Supercross and Pro Motocross championships has steered the direction of CRF450R development. As a result, the 23YM CRF450R and CRF450RX are easier to rider faster, for longer.
The 23YM CRF450R features new, narrower intake ports, longer air funnel, smaller 44mm diameter throttle body and revised, factory rider-spec. cam timing that help the engine deliver over 10% more low-rpm torque; this is complemented by an increased – and smoother – low-down power delivery, helping the CRF450R drive harder through the corners. The rear muffler is also more durable through the use of tougher aluminium, but with no weight gain.
Controlling the power increase, revised frame rigidity allows for an increase in the rear spring rate and damping for improved rider feedback, control and drive over rutted ground. Likewise, front tyre grip is heightened and overall, the 23YM CRF450R is more stable and turns even faster with better suspension reaction and bump absorption.
New graphics feature a redesign of the iconic HRC logo, representing the expansion of HRC’s activities into automobile racing, while the 23YM CRF450R 50th Anniversary marks half a century since the CR250M Elsinore took to the track. Paying tribute to the mighty CRs of the 1980s, it comes complete with signature features including the blue seat, white number boards, gold wheels and handlebar, metallic grey top/bottom yokes and unique radiator shroud graphics.
The 23YM CRF450RX benefits from the same updates as its motocross sibling but is cross-county prepped with 8L plastic fuel tank, 18-inch rear wheel, specific ECU settings for ignition/injection, forged aluminium sidestand and knuckle guards.
Win on Sunday, sell on Monday
The CR250M Elsinore was a product of growing motocross competition (and sales demand) in the USA and Europe. It was Honda’s first built-from-scratch, two-stroke production MX machine and met with instant success, thanks to its user-friendliness, high build quality and reliability. Promotional activities for the new bike included a much-loved advertising film featuring Steve McQueen.
Named after the legendary Elsinore Grand Prix (held by Lake Elsinore, California), the air-cooled 247.8cc engine propelled 104kg while the chassis comprised a semi-double tubular steel frame, telescopic forks, steel swingarm, twin rear shocks and drum brakes front and rear. Honda’s MX journey had begun…
Liquid-cooling and Pro-Link arrive
A big year for development. The CR250M had an earned its racing ‘R’ in the late ‘70s, and in 1981 Honda unleashed their factory-bike technology to the buying public with the first production, liquid-cooled machine. The engine was a long-stroke design cooled by two small radiators. Perhaps more telling is the chassis; the aluminium swingarm and single, remote-reservoir Pro-Link rear shock pointed to the future, complementing the known quantities of steel frame and double-leading shoe drum brake.
Only one year later in 1982, Honda’s Racing Service Centre was reborn as the Honda Racing Corporation. HRC soon became synonymous with motocross racing success.
The ‘golden era’ of 500s
Originally launched in 1984 in an air-cooled form (with over 70Nm torque on tap) the CR500R was water-cooled in 1985. Now very much a bike of myth and legend, it perhaps defined the motocross heydays of the 1980s with an aesthetic that has inspired the 2023 CRF450R 50th Anniversary model. It tested the limits of chassis technology – and most riders’ ability – to the very limit.
The revolution begins
To make use of the advancements in engine technology and consequent increases in power and torque, Honda took the bold step of producing the first aluminium frame for a production MX bike. Tubular steel’s rigidity was replaced by twin-spar flexibility and other parts combined for a more high tech feel, like fully adjustable Showa suspension and disc brakes front and rear. Recognised as one of the most influential machines of the ‘90s, the CR250R started an off-road revolution that can still be seen in the MX bikes of today.
Open-class power in a 250-sized package
Honda kicked off a new MX mission with its first generation of 450, the first four-stroke and a direct replacement for the CR250R. And with its 250-based chassis, it was slim and lightweight. The 449cc engine was powerful, smooth and with a wide powerband which made it no less potent, but much less intimidating, than a comparable 250cc two-stroke engine. The CRF450R made going faster, easier.
An injection of technology
After steady evolution the CRF450R was reborn with a fuel-injected engine with a 50mm throttle body and 12-hole injector. Owners were also able to make adjustments to fuel delivery and ignition timing via an HRC PGM-FI setting tool. The engine redesign and new chassis were built together with a focus on mass centralisation, making for a compact machine carrying its weight more forward and lower. Suspension was by Kayaba: 48mm Air-Oil-Separated (AOS) USD forks and compact rear shock.
All-new and made for the holeshot
Under the concept of ‘ABSOLUTE HOLESHOT!’ Europe’s favourite open-class MX machine was given a ground-up redesign, with completely new chassis, full Showa suspension and a major top end power boost from a brand-new engine. Standard-fit electric start was a convenient addition a year later and in 2019 an HRC-developed cylinder head upped power and torque considerably; HRC launch control was also added. In 2020 3-level Honda Selectable Torque Control (HSTC) gave the rider options to manage rear wheel traction.
CRF450R 50th Anniversary
Success builds success, and celebration
In 2021, aside from the wheels and fundamental engine architecture, the CRF450R was effectively a totally new bike, drawing heavily on developments from the 2019 MX GP championship-winning CRF450RW of Tim Gajser. He and HRC secured the title for a second year in 2020 and finished a close third in 2021.
As ever with motocross, and the CRF450R, the game moves on and the latest machine is armed with a host of factory rider led and HRC updates to engine and chassis aimed at making going fast – really fast – that much easier. And 2023 marks 50 years since the bike that started it all, the CR250M Elsinore. The CRF450R 50th Anniversary limited edition pays stunning homage to the mighty CRs of the 1980s and, true to Honda’s roots in the sport – and to the blueprint laid down all those years ago – remains an HRC-bred racer that it is possible to buy.