2006 Suzuki RM-Z250
General Specifications
| Model | Suzuki RM-Z250 |
| Year | 2006 |
| Category | Motocross |
| Engine Type | 249 cc single-cylinder, four-stroke, DOHC, 4-valve, liquid-cooled |
| Weight | Approximately 92.5 kg dry |
Engine
| Displacement | 249 cc |
| Bore x Stroke | 77.0 x 53.6 mm |
| Compression Ratio | 12.6:1 |
| Fuel System | Keihin FCR37 37 mm flat-slide carburettor with throttle position sensor | Replacement Options |
| Ignition | Digital electronic CDI with throttle-position input |
| 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 | #520 chain |
Dimensions
| Overall Length | Approximately 2,170 mm |
| Overall Width | Approximately 840 mm |
| Overall Height | Approximately 1,270 mm |
| Wheelbase | Approximately 1,475 mm |
| Ground Clearance | Approximately 340 mm |
| Seat Height | Approximately 960 mm |
| Fuel Capacity | Approximately 7.6 L |
Chassis
| Frame | High-tensile steel perimeter motocross frame with aluminium swingarm |
| Front Tyre | 80/100-21 51M | Tyre Size Guide |
| Rear Tyre | 100/90-19 57M | Tyre Size Guide |
Suspension
| Front Suspension | 48 mm Kayaba inverted cartridge fork, adjustable compression and rebound damping | Fork Oil Levels |
| Front Suspension Travel | 300 mm |
| Rear Suspension | Link-type gas-charged monoshock, adjustable spring preload, compression and rebound damping |
| Rear Suspension Travel | 310 mm |
| Fork Oil | Suzuki Fork Oil SS-05 or equivalent high-performance suspension 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 1.85 in |
Service Data
| Fuel Type | Premium unleaded petrol, minimum 95 RON |
| Premix Information | Not applicable - four-stroke engine with separate engine lubrication |
| Gearbox Oil | Engine and transmission share the same oil; SAE 10W-40, API SF/SG or SH/SJ with JASO MA. Approximately 900 ml oil change, 950 ml with filter change and 1,000 ml after overhaul |
| Air Filter | Washable oiled polyurethane foam element |
| Service Notes | Competition four-stroke motocross machine. Check engine oil frequently and inspect valve clearance, air filter, coolant, clutch, drive chain and brakes at short competition-service intervals. |
2006 Suzuki RM-Z250 – The Final Steel-Framed First Generation
The 2006 Suzuki RM-Z250 was primarily a refinement of the first-generation machine rather than an all-new model. Suzuki retained the steel perimeter frame, 249 cc DOHC engine and Keihin FCR carburettor used on the earlier RM-Z250, making 2006 the final stage of the original platform before Suzuki introduced a much more substantial redesign for 2007.
The engine continued with its 77.0 x 53.6 mm bore and stroke, four-valve cylinder head and high 12.6:1 compression ratio. Fuel was delivered through a 37 mm Keihin FCR flat-slide carburettor equipped with a throttle-position sensor. Correct jetting and accelerator-pump setup remain important on surviving bikes, and owners replacing damaged components can compare replacement carburettor options.
The chassis also remained based around the steel perimeter design used since the RM-Z250's introduction. A 48 mm Kayaba inverted cartridge fork provided approximately 300 mm of travel, while the linkage rear suspension offered around 310 mm. Owners servicing the front end can check the MXOwners fork oil reference when working through suspension maintenance.
Historically, the 2006 model is interesting because it closes the first chapter of the RM-Z250 story. It still reflected the early Suzuki-Kawasaki development period, while the following generation would move Suzuki's 250 four-stroke in a more independent direction. Owners restoring one can also use the MXOwners Parts Finder when checking model-specific replacement components.
