2004 Suzuki RM250

UPDATED MODEL: 2004 SUZUKI RM250

Built for maximum performance, the Suzuki RM250 is heavily updated for ’04. The engine was tweaked to improve overall power and torque at high rpm while the chassis benefits from new Showa suspension components front and rear, an improved riding position and more.

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As with the entire RM family, the RM250 rider also benefits from over $6 million dollars in Suzuki racing contingency money, the Good ScholarProgram , and the Tony D Motocross School.

Improvements to the 2004 Suzuki RM 250 include:

Engine

  • Re-tuned engine for improved overall power and torque, especially at high rpm
  • New cylinder head with reduced squish height for better low-to-mid range throttle response
  • Reshaped sub-exhaust ports for better mid-to-high rpm power delivery
  • Redesigned sub-exhaust port control rods and cams for optimum sub-exhaust port valve operation and improved power delivery
  • Increased crankshaft inertia for better rear wheel traction control and acceleration feel
  • New barrel-type piston rings for improved low rpm engine response
  • Increased exhaust valve governor spring rate for optimum exhaust valve control and power delivery
  • Refined carburetor settings with new jet needle, throttle valve and power jet for increased low-rpm throttle response
  • New air filter with larger mesh size improves airflow to the engine for better power and throttle response
  • Redesigned shift cam stopper system features a reshaped stopper plate, more rigid stopper arm and higher spring rate for more precise gear shift operation and improved shifting feel

RM250 (K4) AT A GLANCE

Suggested Retail: $5,999.00
Engine Type: 249 cc liquid-cooled, two-stroke single.
Bore and Stroke: 66.4 mm x 72.0mm
Front Brake: Hydraulic Disc
Rear Brake: Hydraulic Disc
Wheelbase: 57.9 in (1470 mm)
Dry Weight: 212 lbs. (96 kg)

Chassis

  • Improved riding position with 10mm lower seat, foot pegs moved back 10mm, handlebars raised 7mm — allowing the rider greater freedom of movement.
  • Increased frame reinforcement to improve rigidity and straight-line performance
  • New Showa twin-chamber front forks and Showa rear shock absorber (similar design as RM125)
  • New rear shock linkage system to provide more progressive rear shock performance; cushion lever is now connected to the swingarm anthe link rods to the frame
  • New-style front brake master cylinder features an advanced piston seal design for improved brake lever feel, and permits simplified hose routing and a shorter brake hose
  • Floating front brake rotor for more consistent brake performance and reduced drag
  • Simplified rear brake master cylinder with built-in reservoir – reduces weight by eliminating brackets required for separate reservoir and hose
  • More compact swingarm-mounted rear brake caliper bracket
  • Improved rear caliper piston seal design for reduced brake drag, plus improved brake pad retainers designed to prevent mud buildup between pads and retainers
  • Shorter rear sprocket bolts provide more wrench space between spokes and nuts for easier rear wheel maintenance
  • Quick-adjust clutch cable adjuster allows clutch lever play to be adjusted by hand
  • New fuel tank cap vent design prevents fuel from flowing back through the vent system
  • New fuel tank mounting bolts with pilot shape for easier tank installation

2004 RM250 SPECIFICATIONS

DIMENSIONS AND DRY MASS

Overall length: 2175 mm (85.6 in.)
Overall width: 840 mm (33.1 in.)
Overall height: 1280 mm (50.4 in.)
Wheelbase: 1470 mm (57.9 in.)
Ground clearance: 350mm (13.8in.)
Seat height: 950mm (37.4in.)
Dry mass: 96 kg (212 lbs.)

ENGINE

Type: 2-stroke, 1-cylinder, liquid cooled
Bore: 66.4 mm
Stroke: 72.0 mm
Piston displacement: 249.0cc
Compression ratio: 8.8/10.6:1
Carburetor: Keihin PWK38S Single
Air cleaner: Foam element
Starter system: Primary kick
Lubrication System: Pre-mix

TRANSMISSION

Clutch: Wet multi-plate type
Transmission: 5-speed constant mesh
Gearshift pattern: 1 down, 5 up
Primary ratio: 3.000 (63/21)
Gear ratios: 1st 1.800 (27/15)
2nd 1.470 (25/17)
3rd 1.210 (23/19)
4th 1.000 (21/21)
5th 0.869 (20/23)
Final ratio: 3.846 (50/13)
Drive chain: 520 chain, 114 link

CHASSIS

Front suspension: 47 mm Inverted twin chamber cartridge type, 22-way compression and 20 way rebound damping
Rear suspension: Link Type, adjustable preload 23 way compression (4 high speed, 16 low speed) & 19 way rebound damping
F. suspension stroke: 310 mm (12.2 in.)
R. wheel travel: 320 mm (12.6 in.)
Rake: 27º 30′
Carburetor: Keihin PWK38S Single
Air cleaner: Foam element
Starter system: Primary kick
Lubrication System: Pre-mix

TRANSMISSION

Clutch: Wet multi-plate type
Transmission: 5-speed constant mesh
Gearshift pattern: 1 down, 5 up
Primary ratio: 3.000 (63/21)
Gear ratios: 1st 1.800 (27/15)
2nd 1.470 (25/17)
3rd 1.210 (23/19)
4th 1.000 (21/21)
5th 0.869 (20/23)
Final ratio: 3.846 (50/13)
Drive chain: 520 chain, 114 link

CHASSIS

Front suspension: 47 mm Inverted twin chamber cartridge type, 22-way compression and 20 way rebound damping
Rear suspension: Link Type, adjustable preload 23 way compression (4 high speed, 16 low speed) & 19 way rebound damping
F. suspension stroke: 310 mm (12.2 in.)
R. wheel travel: 320 mm (12.6 in.)
Rake: 27º 30′
Trail: 115 mm (4.53 in.)
Steering angle: 45º
Turning radius: 2.3m (7.5 ft.)
Front brake: Disc
Rear brake: Disc
Front tire size: 80/100-21 51M
Rear tire size: 10/90-19 57M

ELECTRICAL

Ignition type: CDI
Ignition timing: 4.5º B.T.D.C. @ 1000r/min
Spark plug: NGK BR8EG

CAPACITIES

Fuel tank: 8.0 L (2.1 gal.)
Transmission oil: 750ml (0.8 qt.)
Engine coolant: 1100 ml (1.2 qt.)

American Suzuki Motor Corporation makes every effort to present the most current specifications.

Trail: 115 mm (4.53 in.) Steering angle: 45º Turning radius: 2.3m (7.5 ft.) Front brake: Disc Rear brake: Disc Front tire size: 80/100-21 51M Rear tire size: 10/90-19 57M

ELECTRICAL

Ignition type: CDI
Ignition timing: 4.5º B.T.D.C. @ 1000r/min
Spark plug: NGK BR8EG

CAPACITIES

Fuel tank: 8.0 L (2.1 gal.)
Transmission oil: 750ml (0.8 qt.)
Engine coolant: 1100 ml (1.2 qt.)

American Suzuki Motor Corporation makes every effort to present the most current specifications.