The Honda CRF450R is a

four-stroke A four-stroke (also four-cycle) engine is an internal combustion (IC) engine in which the piston completes four separate strokes while turning the crankshaft. A stroke refers to the full travel of the piston along the cylinder, in either directio ...

racing

motocross Motocross is a form of off-road motorcycle racing held on enclosed off-road circuits. The sport evolved from motorcycle trials competitions held in the United Kingdom. History Motocross first evolved in Britain from motorcycle trials competi ...

motorcycle A motorcycle (motorbike, bike, or trike (if three-wheeled)) is a two or three-wheeled motor vehicle steered by a handlebar. Motorcycle design varies greatly to suit a range of different purposes: long-distance travel, commuting, cruising ...

built by

Honda Motor Company is a Japanese public multinational conglomerate manufacturer of automobiles, motorcycles, and power equipment, headquartered in Minato, Tokyo, Japan. Honda has been the world's largest motorcycle manufacturer since 1959, reaching a product ...

. It is the successor to the

Honda CR250R The Honda CR250R was a Honda racing In sport, racing is a competition of speed, in which competitors try to complete a given task in the shortest amount of time. Typically this involves traversing some distance, but it can be any other task i ...

two-stroke. The

Honda CRF450X The Honda CRF450X is an off-road motorcycle made by Honda Motor Company. It currently has a liquid-cooled single-cylinder A single-cylinder engine, sometimes called a thumper, is a piston engine with one cylinder. This engine is often used f ...

is the

enduro Enduro is a form of motorcycle sport run on extended cross-country, off-road courses. Enduro consists of many different obstacles and challenges. The main type of enduro event, and the format to which the World Enduro Championship is run, is a ...

version of the Honda CRF450R.

Notable changes

First generation: 2002–2004

The CRF450R was introduced in 2002. Unlike the competing

Yamaha Yamaha may refer to: * Yamaha Corporation, a Japanese company with a wide range of products and services, established in 1887. The company is the largest shareholder of Yamaha Motor Company (below). ** Yamaha Music Foundation, an organization estab ...

YZ426, the first generation CRF450R has an aluminum frame. In 2003, Honda added a longer shock and new linkage to raise the rear end and steepen the head angle. In 2003, camshaft, exhaust, and ignition map were revised. The handlebar size was changed to in 2004.

Second generation: 2005–2008

The second generation CRF450R had a redesigned motor and frame with new bodywork styling from the new CRF250R. In 2008, the Honda Progressive Steering Damper (HPSD) was introduced, allowing the steering geometry to be more aggressive.

Third generation: 2009–2012

The third generation CRF450R had

fuel-injection Fuel injection is the introduction of fuel in an internal combustion engine, most commonly automotive engines, by the means of an injector. This article focuses on fuel injection in reciprocating piston and Wankel rotary engines. All comp ...

and an all-new bike to match.

Fourth generation: 2013–2016

The fourth generation of the CRF450R introduced a new twin-exhaust to centralize mass. Also new to the fourth generation were air forks.

Fifth generation: 2017–2020

The 2017 CRF450R offers a new engine design and optional electric start. The air forks were switched out in favor of Showa coil spring forks. The 2018 offers standard electric start and new engine mount offer most chassis flex. The 2019 CRF450R features an all-new swing-arm and a launch control setting.

Sixth generation: 2021–present

New slimmer frame and plastic design, single exhaust ported through center of the upright. The exhaust port is now oval instead of round.

References

{{Honda CRF450R Motocross Motorcycles introduced in 2002