2009 Suzuki RM-Z250
General Specifications
| Model | Suzuki RM-Z250 |
| Year | 2009 |
| Category | Motocross |
| Engine Type | 249 cc single-cylinder, four-stroke, DOHC, 4-valve, liquid-cooled |
| Weight | 92.5 kg dry |
Engine
| Displacement | 249 cc |
| Bore x Stroke | 77.0 x 53.6 mm |
| Compression Ratio | 13.4:1 |
| Fuel System | Keihin FCR 37 mm flat-slide carburettor | Replacement Options |
| Ignition | Electronic CDI |
| Spark Plug | NGK CR8E |
| Spark Plug Gap | 0.7-0.8 mm |
| Cooling System | Liquid-cooled |
| Starting System | Primary kick starter with automatic decompression |
Transmission
| Transmission | 5-speed constant-mesh |
| Clutch | Wet multi-plate |
| Final Drive | Chain |
Dimensions
| Overall Length | 2,170 mm |
| Overall Width | 830 mm |
| Overall Height | 1,270 mm |
| Wheelbase | 1,470 mm |
| Ground Clearance | 355 mm |
| Seat Height | 955 mm |
| Fuel Capacity | 6.5 L |
Chassis
Suspension
| Front Suspension | 47 mm Showa inverted twin-chamber telescopic fork, adjustable compression and rebound damping | Fork Oil Levels |
| Front Suspension Travel | 310 mm |
| Rear Suspension | Showa link-type monoshock, adjustable spring preload, high/low-speed compression and rebound damping |
| Rear Suspension Travel | 310 mm |
| Fork Oil | Suzuki Fork Oil SS-05 or equivalent; twin-chamber Showa fork |
Brakes & Wheels
| Front Brake | Single hydraulic disc |
| Rear Brake | Single hydraulic disc |
| Front Wheel Size | 21 in |
| Rear Wheel Size | 19 in |
Service Data
| Fuel Type | Premium unleaded petrol |
| Premix Information | Not applicable - four-stroke engine with separate engine lubrication |
| Gearbox Oil | Engine and transmission share the same oil; SAE 10W-40 four-stroke motorcycle oil meeting API SF/SG or SH/SJ and JASO MA specification |
| Air Filter | Washable polyurethane foam element, oiled with foam air-filter oil |
| Service Notes | Competition four-stroke motocross engine. Check engine oil frequently and inspect valve clearance, air filter, coolant, drive chain, brakes and controls at competition-service intervals. |
2009 Suzuki RM-Z250 – The Last Carburettor-Era RM-Z250
The 2009 Suzuki RM-Z250 was primarily a refinement of the existing RM-Z250 rather than a major redesign. Suzuki retained the aluminium chassis, 249 cc DOHC four-stroke engine and Keihin FCR carburettor that defined the previous model, concentrating on detail improvements before the much larger changes that arrived with the next generation.
Its 249 cc engine used a 77.0 x 53.6 mm bore and stroke, four valves and a high 13.4:1 compression ratio. Fuel was still delivered through a 37 mm Keihin FCR flat-slide carburettor, making the 2009 model one of the final RM-Z250s where traditional jetting, accelerator-pump setup and carburettor tuning were part of normal race preparation. Owners replacing worn or missing induction components can compare replacement carburettor options.
The aluminium twin-spar chassis continued Suzuki's emphasis on sharp cornering and responsive handling. A 47 mm Showa twin-chamber fork and Showa link-type rear shock provided approximately 310 mm of travel at each end. Correct oil, bleeding and adjustment are important on these competition forks, and the MXOwners fork oil reference is useful when servicing the front suspension.
For owners today, the 2009 RM-Z250 represents an interesting transition point. It combines Suzuki's mature carburetted four-stroke package with the lightweight RM-Z chassis just before electronic fuel injection became part of the model's development. When sourcing replacement components for an older race bike, the MXOwners Parts Finder can also help identify suitable parts.
