With an earned reputation not only for racing success, but also exceptional handling, excellent ergonomics, strong acceleration and rock-solid durability, the CRF250R is a worthy platform for Honda HRC Progressive riders Jo Shimoda and Chance Hymas, but also for privateers and aspiring local racers. The CRF250R possesses the ingredients necessary for success on the track.
HISTORY
Just two years after the debut of the CRF450R—Honda’s first four-stroke motocrosser—the original CRF250R was introduced for the 2004 model year. Generation 2 followed in 2006, with a focus on achieving balance through careful vehicle packaging. That bike won the AMA Supercross 250SX East crown at the hands of Davi Millsaps, and two years later Trey Canard took that title aboard the same platform.
The 2010 iteration introduced fuel injection, which Canard employed to good effect in earning that year’s AMA Pro Motocross 250 Championship. Justin Barcia won the following year’s 250SX East crown, and in 2012 Barcia and Eli Tomac dominated AMA Supercross, winning the East and West titles, respectively. In the generation’s final year, Tomac earned the AMA Pro Motocross 250 Championship, with Wil Hahn taking the 250SX East crown.
The model’s 2014 iteration was noted for its suspension updates, and Justin Bogle rode it to that year’s East Region Championship. The 2018 model featured a new dual-overhead-cam engine, and Chase Sexton proved its effectiveness when he rode it to the 2019 and 2020 East Region titles, with Jett Lawrence taking the 2021 AMA Pro Motocross crown.
The 2022 model year saw a major overhaul of the CRF250R, with the ambitious design goal of improving engine performance and toughness, while reducing vehicle weight. That platform was raced with success by the factory team, with Jett Lawrence taking it to the ’22 crowns in East Region Supercross and AMA Pro Motocross; in ’23, Jett and his brother Hunter earned the West and East Region Supercross crowns, respectively.
In 2025, the CRF250R took another step forward, with optimized chassis rigidity and suspension updates for improved handling, plus better power and new bodywork.
STYLING / DESIGN
The standard CRF250R is known for its excellent ergonomics. The radiator shrouds and side plates promote freedom of movement thanks to a smooth, flat surface, and although the bike is notable for its slim profile, the side-plate profile is wide enough to provide good contact for gripping the bike. Cooling the CRF250R’s engine is crucial to maintaining performance and overall durability. Computational fluid dynamics were used to design the air-outlet vents in the shrouds, and the radiator grilles are optimized in terms of both the number of fins and the fin angle. Each radiator shroud is produced in a single piece. The titanium 1.7-gallon fuel tank is exceptionally light.
The seat base has a unique design, featuring rearward-facing tongues and front-located mounting tabs that utilize acceleration forces to keep the seat firmly in place. The Renthal® Fatbar® handlebar is mounted in a clamp that offers four possible mounting positions with a range of 26mm, thanks to the clamp’s two mounting locations and the ability to rotate it 180º.
Maintenance is simple, with only eight fasteners used to secure the main bodywork components, including the radiator shrouds, side plates and seat, all with 8mm bolt heads.
ENGINE / DRIVETRAIN
The 249cc liquid-cooled, single-cylinder, double-overhead camshaft, four-valve engine design achieves excellent performance and durability. The bore and stroke are 79.0mm and 50.9mm, respectively, and the compression ratio is 13.9:1.
Intake
The airbox has a direct pathway for airflow, resulting in precise throttle control and excellent top-end power. The fuel injector’s angle is 60 degrees, enabling the spray to reach all the way to the back of the butterfly, and the throttle bore is 44mm. Together, these features cool the intake charge, maximizing air-intake efficiency and torque at low revs. The air filter is held in place via a spring-loaded clip for easy serviceability.
Head
The cylinder head features four titanium valves (33mm intake and 26mm exhaust), with the former using dual springs (one inside the other) to ensure precise movement at higher revs. The intake camshaft sprocket is press-fit, which enhances valve-timing accuracy while minimizing weight.
The camshaft holder has a rigid design that maintains camshaft-journal roundness, contributing to timing accuracy and minimizing friction at high rpm. Durability at high engine speeds is maximized by a high flow of lubrication to the oil-supply journal and the cylinder head. The water-pump gear is thick, to enhance strength.
Exhaust
The system uses a single, straight exhaust port for good torque and low-rpm drivability. The single exhaust header is routed close to the engine on the right side for a narrow cross section and good rider mobility, and the single muffler has internal baffling that is optimized for torque delivery.
Clutch
The clutch pack has nine discs, to maximize the amount of disc friction material and minimize the load on individual discs. The clutch basket is rigid for durability, a friction spring reduces spring load, and lubrication is optimized to reduce wear. The primary ratio is 3.047.
Transmission
When designing the five-speed gearbox, engineers made efforts to enhance feel during up- and downshifts between second and third gears—a very common operation on a 250 motocrosser; only one shift fork is operated to execute this gear-change. The countershaft has good rigidity, and the shift drum is light, thanks to a large through hole and use of only two lead grooves.
The design results in excellent gear-shifting feel for the rider, and gear ratios are optimized to best utilize the engine power in the low and middle rpm ranges.
Electronics
In order to fully realize the engine’s potential, the ECU mapping supplies the optimum air/fuel mixture and ignition timing at all throttle positions and engine speeds. HRC-inspired launch control facilitates holeshots.
A gear-position sensor allows the use of three specific ignition maps for first and second gears, third and fourth gears, and fifth gear. There are options for Standard, Smooth and Aggressive ignition maps, selectable via a handlebar-mounted switch, enabling simple tuning depending on rider preference or course conditions.
- Mode 1: Standard
- Mode 2: Smooth
- Mode 3: Aggressive
In addition, Honda Selectable Torque Control offers three levels of intervention. HSTC monitors rpm spikes and responds by temporarily reducing torque; this is accomplished by retarding ignition timing and controlling PGM-FI, to aid rear traction. The three different modes differ in drive-management level, for differing riding conditions or rider preferences:
- Mode 1: The system intervenes the least, and waits the longest to do so—useful for reducing wheel-spin and maintaining control in tight corners.
- Mode 2: A midpoint between modes 1 and 3 in terms of how quickly and assertively the system intervenes.
- Mode 3: The system intervenes most quickly and assertively, which helps in conditions that are slippery or muddy.
The HSTC system can also be switched off completely.
HRC Launch Control provides the best option for a strong start and also has three modes to choose from:
- Level 1: 9,500 rpm, for high-traction conditions and/or advanced riders.
- Level 2: 8,500 rpm, for high-traction conditions and/or average riders.
- Level 3: 8,250 rpm, for slippery conditions and/or novice riders.
CHASSIS / SUSPENSION
The CRF250R is known for its precise handling, stability, comfort and overall rideability, especially late in the moto, when track conditions are at their worst.
Frame / Subframe
The mainframe design contributes to a comfortable and confidence-inspiring ride. Optimized torsional rigidity contributes to overall stability, while an ideal torsional/lateral rigidity ratio allows for precise cornering. Vertical torsional rigidity is designed to enhance stability in rough track conditions.
Perhaps counterintuitively, a relatively high overall frame rigidity helps give the model a compliant, composed ride character. The subframe mounting point is positioned at a rigid location on the mainframe, minimizing energy transmission from the rear of the motorcycle to the front, contributing to excellent stability and comfort.
Suspension
The Pro-Link rear-suspension system uses a Showa shock absorber. Because of the optimized frame rigidity, the shock moves freely, minimizing harshness while offering hold-up for big impacts and performance in ruts. The shock is easy to remove for service and adjustment, only requiring the removal of the side covers, muffler and ECU.
Front suspension comprises a 49mm inverted Showa coil-spring fork and a gas-liquid separation structure, plus kit-fork-inspired Bending Control Valves. These components help ensure consistent stroke, from initial movement to the end of travel, minimizing any harshness or a “step” feeling. A fork is adjustable for compression and rebound damping, and its setting is paired with that of the shock, for proper front-rear balance. The upper and lower triple clamps are designed to offer a good rigidity balance, for optimum handling and feel through corners.
Wheels
The black D.I.D rims (21-inch front, 19-inch rear) deliver durable performance and good looks. The CRF250R comes with Pirelli Scorpion MX32 tires, which are ideal for soft and intermediate terrain, and which offer an appropriate amount of sidewall flex for a 250 motocrosser.
Brakes
The front-brake caliper was developed based on feedback from Honda HRC Progressive riders, and it features two pistons (sized 30mm and 27mm), allowing for a smooth, linear feel that’s consistent throughout the moto. The caliper also features machined accents. The rear brake has a single piston. The brake rotors (sized 260mm front, 240mm rear) have a petal design to disperse heat.
