Standard Features
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The CBR250R introduced many people to the joys of riding smaller supersport machines and its followers are dedicated. Building on the success of the original platform, the CBR300R adds aggressive new styling and increased power and torque throughout the rev range. Retained are the 250's excellent mass centralization, aggressive geometry and functional ergonomics, but an improved power-to-weight ratio enhances performance across the board. An 8 mm stroke increase gives a roughly 17% increase in power while the light and manageable weight ensures riders can take full advantage of the increased performance. The single cylinder engine design also has a number of advantages over twin cylinder competitors. Not only does the advanced engine reduce overall weight and size, improving manoeuvrability, but it simplifies maintenance, improves fuel economy due to reduced drag and lowers operating cost. Wrapped around the revised engine is all-new bodywork that takes its styling cues directly from the razor sharp CBR1000RR. The CBR300R now looks every bit as aggressive as its larger siblings and the family resemblance is well earned.

CBR300R - more of what you want and less of what you don't.


Model Year
Millennium Red
Stock Number


357 lbs. (161.9 kg)
54.3 in. (1,380 mm)
Seat Height
30.7 in. (779 mm)


1-cylinder, 4-stroke, chain-driven DOHC, 4 valves per cylinder
286 cc
Bore x Stroke
76 x 63 mm
Compression Ratio
Fuel System
PGM-FI electronic fuel injection
Fuel Tank Capacity
13 l


Final Drive
O-ring-sealed chain


Front: 296 mm disc with 2-piston caliper
Rear: 220 mm disc with 1-piston caliper
Front: 110/70-17
Rear: 140/70-17


Front: 37 mm telescopic fork; 4.65 in. (118 mm) travel
Rear: Pro-Link single shock with spring preload adjustment; 4.07 in. (103 mm) travel

Standard Features

Engine / Drivetrain
 The 286 cc single-cylinder engine is purpose-built for the CBR300R, and boasts high-performance features such as dual overhead camshafts driven by a Hy-Vo-type silent chain, forked roller rocker arms, a compact four-valve cylinder head, a counterbalance shaft, and liquid cooling.  
 The light and compact engine contributes to the CBR300R’s nimble steering, intuitive handling and impressive power-to-weight ratio, allowing it to compete with twin-cylinder bikes of similar displacement.  
 Shim-style valve adjustment allows easy inspection and maintenance, although with a recommended inspection interval of 48,000 km, you’ll ride a long, long time between any needed adjustments.  
 The engine countershaft sits lower than the mainshaft in a “stacked” formation to reduce the engine’s front-to-rear dimensions.  
 The engine produces a remarkably broad torque curve for strong low-rpm performance, and peak horsepower kicks in at 8,500 rpm—well below redline. This wide spread of power makes the CBR300R easy and confidence-inspiring to ride, in both stop-and-go situations and on the highway, while also returning impressive fuel economy.  
 The crankshaft runs in plain bearings for quieter operation and the big end of the connecting rod spins in a needle bearing, both contributing to the engine’s high-performance credentials.  
 A gear-driven counterbalance shaft helps quell engine vibration for enhanced rider comfort. It’s located so close to the crankshaft that the balancer weight passes between the two crank weights to keep the engine as compact as possible while improving mass centralization. The counterbalance shaft has been updated for 2015 to compensate for the increase in displacement.  
 Honda’s Programmed Fuel Injection (PGM-FI) continuously monitors several variables to ensure the correct fuel mixture for the current riding and atmospheric conditions. The system delivers optimal performance and remarkably crisp throttle response over a wide range of operating conditions, plus improved fuel economy. The PGM-FI system incorporates an Idle Air Control Valve (IACV) to smooth responses to small changes in throttle position.  
 The PGM-FI fuel injection - with 38 mm throttle bore has been remapped for the larger engine while maintaining a focus on crisp throttle response across the rev range.  
 The six-speed transmission works in concert with the engine’s broad power delivery to produce quick acceleration plus excellent fuel economy during highway cruising. Final drive gearing is also taller for 2015 to further improve efficiency at highway speeds.  
 New CBR500R-type exhaust is an aesthetic and functional upgrade.  
Chassis / Suspension
 Diamond-shaped twin-spar steel frame plus a 37 mm front fork and Pro-Link single-shock rear suspension provide impressive handling and a comfortable ride.  
 Curb weight of only 357 lbs. (161.9 kg) gives the CBR300R outstanding maneuverability and helps instill rider confidence.  
 Sporty ergonomics promote a balanced seating position for optimum control and long-distance comfort.  
 Full-sized 17-inch cast wheels with a 110/70 – 17 front tire and a 140/70 – 17 rear tire provide big-bike feel, grip and handling traits.  
 All-new CBR1000RR inspired bodywork features dual headlights and colour matched undercowl. The unmistakably CBR fuel tank and steeply raked tail complete the aggressive look.  
Additional Features
 Multi-function digital instrument panel includes speedometer, tachometer, engine temperature display, fuel gauge, clock, odometer and trip meter.  
 A narrower, reshaped seat makes it easier to reach the ground.  
 Grab rails on the tail section are designed to fit gloved hands, giving passengers a dedicated handhold while riding two-up.  

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