2007 Honda CR250R
General Specifications
| Model | Honda CR250R |
| Year | 2007 |
| Category | Motocross |
| Engine Type | 249 cc single-cylinder, two-stroke, liquid-cooled with reed-valve induction |
| Weight | Approximately 96 kg dry |
Engine
| Displacement | 249 cc |
| Bore x Stroke | 66.4 x 72.0 mm |
| Compression Ratio | Approximately 8.5:1 |
| Fuel System | 38 mm Mikuni TMX flat-slide carburettor | Replacement Options |
| Ignition | CDI electronic ignition |
| Spark Plug | NGK BR8EG |
| Spark Plug Gap | 0.5-0.6 mm |
| Cooling System | Liquid-cooled |
| Starting System | Primary kick starter |
Transmission
| Transmission | 5-speed constant-mesh |
| Clutch | Wet multi-plate |
| Final Drive | #520 chain |
Dimensions
| Overall Length | Approximately 2,185 mm |
| Overall Width | Approximately 830 mm |
| Overall Height | Approximately 1,280 mm |
| Wheelbase | Approximately 1,480 mm |
| Ground Clearance | Approximately 340 mm |
| Seat Height | Approximately 955 mm |
| Fuel Capacity | Approximately 7.7 L |
Chassis
Suspension
| Front Suspension | 47 mm Showa inverted twin-chamber cartridge fork, adjustable compression and rebound damping | Fork Oil Levels |
| Front Suspension Travel | 315 mm |
| Rear Suspension | Pro-Link Showa gas-charged monoshock, adjustable spring preload, compression and rebound damping |
| Rear Suspension Travel | 320 mm |
| Fork Oil | Honda Ultra Cushion Oil Special 5W or equivalent Showa-compatible fork fluid |
Brakes & Wheels
| Front Brake | Single hydraulic disc, twin-piston caliper |
| Rear Brake | Single hydraulic disc, single-piston caliper |
| Front Wheel Size | 21 x 1.60 in |
| Rear Wheel Size | 19 x 2.15 in |
Service Data
| Fuel Type | Premium unleaded petrol |
| Premix Information | 32:1 fuel-to-oil ratio using high-quality two-stroke racing oil | Premix Calculator |
| Gearbox Oil | Honda GN4 10W-40 or equivalent motorcycle oil; approximately 750 ml after draining and approximately 850 ml after disassembly |
| Air Filter | Washable oiled polyurethane foam element |
| Service Notes | Competition two-stroke motocross machine. Maintain correct premix ratio and inspect piston, rings, reed valves, air filter, gearbox oil, drive chain, brakes and suspension at regular race-service intervals. |
2007 Honda CR250R – The Final Honda 250 Two-Stroke
The 2007 Honda CR250R was largely a carryover refinement of the 2006 machine rather than a new generation, but historically it became one of the most significant CR250Rs because it was the final model year of Honda’s legendary 250 cc two-stroke motocross line.
Its 249 cc liquid-cooled engine retained the familiar 66.4 x 72.0 mm bore and stroke, reed-valve induction and 38 mm Mikuni TMX carburettor. The CR250R still delivered the sharp throttle response and relatively simple engine architecture that had made two-stroke motocross bikes popular for decades. Owners maintaining the original induction system can compare replacement carburettor options when worn or missing components need replacement.
Honda continued with its aluminium twin-spar chassis, 47 mm Showa twin-chamber fork and Pro-Link rear suspension. The combination gave the CR250R precise steering and substantial suspension adjustment for competition use. Correct servicing remains important on surviving machines, and the MXOwners fork oil reference can assist when working on the front suspension.
The 2007 model closed a CR250 lineage stretching back decades. Honda’s motocross development had shifted decisively toward the CRF four-strokes, and no 2008 CR250R followed. That final-year status has made the 2007 increasingly interesting to riders, restorers and collectors, while the MXOwners Parts Finder can help owners identify replacement components for keeping these last-generation CR250Rs in service.
