2011 Honda CRF250R
General Specifications
| Model | Honda CRF250R |
| Year | 2011 |
| Category | Motocross / Competition |
| Engine Type | Liquid-cooled, four-stroke, single-cylinder, SOHC Unicam, four valves |
| Weight | 103.7 kg kerb weight (Japanese-market specification) |
Engine
| Displacement | 249.4 cc |
| Bore x Stroke | 76.8 x 53.8 mm |
| Compression Ratio | 13.2:1 |
| Fuel System | Honda PGM-FI electronic fuel injection, 50 mm throttle body |
| Ignition | Full transistor ignition with electronic advance |
| Spark Plug | NGK R0451B-8 |
| Spark Plug Gap | 0.6–0.7 mm (0.024–0.028 in) |
| Cooling System | Liquid-cooled |
| Starting System | Kickstarter |
Transmission
| Transmission | 5-speed close-ratio manual, constant mesh |
| Clutch | Wet multi-plate |
| Final Drive | 520 chain, 13-tooth front / 49-tooth rear sprocket |
Dimensions
| Overall Length | 2,183 mm |
| Overall Width | 827 mm (Japanese-market specification) |
| Overall Height | 1,273 mm |
| Wheelbase | 1,488 mm |
| Ground Clearance | 325 mm |
| Seat Height | 955 mm |
| Fuel Capacity | 5.7 litres (approximately 1.5 US gallons) |
Chassis
| Frame | Aluminium twin-spar perimeter frame |
| Front Tyre | 80/100-21, Dunlop D742FA original equipment | Tyre Size Guide |
| Rear Tyre | 100/90-19, Dunlop D756 original equipment | Tyre Size Guide |
Suspension
| Front Suspension | 48 mm inverted Showa twin-chamber cartridge fork, adjustable compression and rebound damping | Fork Oil Levels |
| Front Suspension Travel | 310 mm (12.2 in) |
| Rear Suspension | Pro-Link Showa single shock, adjustable spring preload, rebound damping and separate high-/low-speed compression damping |
| Rear Suspension Travel | 318 mm (12.5 in), Honda 2011 US specification |
| Fork Oil | Honda HP Fork Oil SS-19; standard outer-chamber capacity 365 ml per fork leg with standard 4.4 N/mm spring. Adjustable range 296–380 ml. Use the service manual for inner-chamber servicing and residual-oil corrections. |
Brakes & Wheels
| Front Brake | Single 240 mm hydraulic disc, twin-piston caliper |
| Rear Brake | Single 240 mm hydraulic disc |
| Front Wheel Size | 21-inch spoked wheel |
| Rear Wheel Size | 19-inch spoked wheel |
Service Data
| Fuel Type | Premium unleaded petrol; minimum 91 PON / approximately 95 RON |
| Premix Information | Not applicable — four-stroke engine with separate lubrication system |
| Gearbox Oil | Honda-recommended SAE 10W-30 four-stroke motorcycle oil meeting JASO MA; approximately 0.68 litres after draining, 0.75 litres after disassembly. Transmission oil is separate from engine oil. |
| Air Filter | Serviceable oiled foam air filter element |
| Service Notes | Competition-use motorcycle requiring frequent servicing. Engine oil approximately 0.67 litres after draining or 0.69 litres with filter replacement. Cold valve clearance: intake 0.12 ± 0.03 mm; exhaust 0.28 ± 0.03 mm. Idle speed 2,000 ± 100 rpm. Inspect valve clearance, air filter, coolant, chain, brakes and suspension regularly. Spark plug is a precious-metal type; replace rather than attempting to adjust an incorrect electrode gap. Transmission and engine oil are serviced separately. Fork oil quantity depends on spring selection and servicing procedure. Consult the 2011 Honda CRF250R competition handbook for maintenance intervals and suspension procedures. |
2011 Honda CRF250R – Refining Honda's Fuel-Injected 250 Motocross Machine
The 2011 Honda CRF250R arrived as a refinement of the substantially redesigned 2010 model rather than an entirely new motorcycle. Honda had introduced electronic fuel injection to its 250 cc four-stroke motocross machine for 2010, replacing the carburettor and establishing a new foundation for the CRF250R. For 2011, the emphasis moved towards improving handling, suspension behaviour and rider confidence while retaining the basic engine and chassis architecture.
The engine remained a 249.4 cc liquid-cooled four-stroke single with Honda's Unicam cylinder head and four-valve arrangement. Its bore and stroke measured 76.8 x 53.8 mm, with a compression ratio of 13.2:1. Honda's PGM-FI system used a 50 mm throttle body to deliver fuel electronically, eliminating the carburettor jetting adjustments familiar to owners of earlier CRF250R models. The fuel-injected engine was paired with a close-ratio five-speed gearbox and wet multi-plate clutch.
The significant change had already occurred in 2010, when Honda moved the CRF250R into the fuel-injection era. The 2011 machine continued that development with revised suspension settings intended to improve control and stability. Some market specifications also described changes to the Honda Progressive Steering Damper, including a larger damper cylinder. These refinements were aimed at making the motorcycle more predictable without abandoning the responsive handling characteristics for which Honda's aluminium-fr
