2016 Honda CRF250R
General Specifications
| Model | Honda CRF250R |
| Year | 2016 |
| Category | Motocross / Competition |
| Engine Type | Liquid-cooled, four-stroke, single-cylinder, SOHC Unicam, four valves, titanium intake and exhaust valves |
| Weight | Approximately 105 kg kerb weight, ready to ride |
Engine
| Displacement | 249.4 cc |
| Bore x Stroke | 76.8 x 53.8 mm |
| Compression Ratio | 13.8:1 |
| Fuel System | Honda Dual-Timing PGM-FI electronic fuel injection, 46 mm throttle body, 12-hole injector, revised 2016 mapping and three selectable engine modes |
| Ignition | ECM-controlled electronic ignition with Engine Mode Select Button (EMSB), offering Standard, Smooth and Aggressive settings |
| Spark Plug | NGK R0451B-8 |
| Spark Plug Gap | 0.60–0.70 mm (0.024–0.028 in) |
| Cooling System | Liquid-cooled, twin aluminium radiators with enlarged left radiator for 2016 |
| Starting System | Kickstarter |
Transmission
| Transmission | 5-speed close-ratio manual, constant mesh, revised shift-drum stopper with bearing-type roller |
| Clutch | Wet multi-plate, cable operated |
| Final Drive | 520 chain, 13-tooth front / 49-tooth rear sprocket |
Dimensions
| Overall Length | 2,181 mm |
| Overall Width | 827 mm |
| Overall Height | 1,271 mm |
| Wheelbase | 1,489 mm |
| Ground Clearance | 322 mm |
| Seat Height | 951 mm |
| Fuel Capacity | 6.3 litres (1.66 US gallons) |
Chassis
| Frame | Aluminium twin-spar perimeter frame with aluminium rear subframe, mass-centralised chassis design and Honda Progressive Steering Damper (HPSD) |
| Front Tyre | 80/100-21 51M, Dunlop Geomax MX52F original equipment | Tyre Size Guide |
| Rear Tyre | 100/90-19 57M, Dunlop Geomax MX52 original equipment | Tyre Size Guide |
Suspension
| Front Suspension | 49 mm inverted Showa Separate Function Fork, Triple Air Chamber (SFF-TAC Air), revised low-friction seals and damping, independently adjustable inner, outer and balance air chambers | Fork Oil Levels |
| Front Suspension Travel | 269 mm (10.6 in) stated suspension travel; 305 mm (12.0 in) fork stroke in Honda's 2016 owner manual |
| Rear Suspension | Honda Pro-Link Showa single shock with revised 2016 damping, adjustable spring preload, rebound damping and high-/low-speed compression damping |
| Rear Suspension Travel | 313 mm (12.3 in) |
| Fork Oil | Honda HP Fork Oil SS-19 (Showa). Right fork: 347 ml outer chamber (excluding damper) and 303 ml damper chamber. Left fork: 313 ml outer tube and 90 ml inner chamber. Standard air pressures: inner chamber 1,075 kPa (156 psi), outer chamber 80 kPa (12 psi), balance chamber 1,075 kPa (156 psi). These are standard assembly quantities; account for residual oil when servicing. Follow Honda's separate filling and bleeding procedures for each fork leg. |
Brakes & Wheels
| Front Brake | Single 260 mm wave-style hydraulic disc, twin-piston caliper |
| Rear Brake | Single 240 mm wave-style hydraulic disc, single-piston caliper |
| Front Wheel Size | 21-inch aluminium spoked wheel |
| Rear Wheel Size | 19-inch aluminium spoked wheel |
Service Data
| Fuel Type | Unleaded petrol, minimum 91 AKI/PON (approximately 95 RON) |
| Premix Information | Not applicable — four-stroke engine with separate engine and transmission lubrication systems |
| Gearbox Oil | Honda GN4 SAE 10W-30 four-stroke motorcycle oil or equivalent meeting API SG or higher and JASO MA, without energy-conserving or resource-conserving friction modifiers. Transmission oil capacity: 0.68 litres after draining; 0.75 litres after disassembly. Separate transmission oil compartment. |
| Air Filter | Washable, reusable oiled foam air filter element in revised 2016 airbox with improved intake duct |
| Service Notes | High-performance competition motorcycle requiring frequent maintenance. Engine oil capacity: 0.67 litres after draining, 0.69 litres with oil filter replacement and 0.85 litres after disassembly. Cold valve clearances: intake 0.12 ± 0.03 mm; exhaust 0.21 ± 0.03 mm. Idle speed: 2,000 ± 100 rpm. Cooling-system capacity: 1.02 litres after draining; 1.10 litres after disassembly. Inspect spark plug using a wire-type gauge and replace rather than bending precious-metal electrodes if the gap is incorrect. Maintain engine and transmission oil separately. Check the three fork air chambers at the specified temperature with the forks unloaded. Inspect fork seals, valve clearances, piston, cam chain, fuel system, air filter, coolant, drive chain and suspension bearings regularly. The 2016 engine uses titanium exhaust valves and revised valve-train components; confirm model-year compatibility before ordering replacements. Refer to the 2016 Honda CRF250R Owner's Manual and Competition Handbook for maintenance intervals and service procedures. |
2016 Honda CRF250R – More Power, Revised Air Forks and HRC-Inspired Engine Development
The 2016 Honda CRF250R received one of the most extensive engine updates since the introduction of the twin-exhaust generation in 2014. Although the motorcycle retained its aluminium twin-spar chassis, fuel-injected Unicam engine architecture and Showa air suspension, Honda introduced substantial changes to improve horsepower, torque and suspension performance. Much of the development drew on experience from Honda's international motocross racing programme, particularly the highly competitive MX2 class.
At the centre of the update was a thoroughly revised 249.4 cc four-stroke engine. Honda introduced a lighter piston and connecting rod, increased the compression ratio from 13.5:1 to 13.8:1 and redesigned the cylinder-head ports to improve gas flow. The exhaust valves changed from steel to titanium, matching the titanium intake valves already used in the engine. A revised camshaft profile
