Category:
Motocross Competition Motorcycle
Target Audience:
Motocross racers, enthusiasts, mechanics
Key Competitors:
Kawasaki KX250F, Yamaha YZ250F, Honda CRF250R, KTM 250 SX-F
Engine Technology:
High-performance 250cc four-stroke single-cylinder engine with advanced fuel injection and ignition systems
Chassis Design:
Lightweight and rigid frame, advanced suspension components for optimal handling and control on varied motocross tracks
Engine Systems:
Engine disassembly, assembly, tuning, lubrication, cooling, fuel injection, ignition, starting, charging
Drivetrain Systems:
Clutch, transmission, shift mechanism, final drive (chain and sprockets)
Chassis Systems:
Frame, suspension (front forks, rear shock), steering, wheels, tires, brakes (front and rear)
Electrical Systems:
Wiring diagrams, lighting, battery, ignition system components, sensors
Maintenance Procedures:
Oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning/replacement, valve clearance checks/adjustments
Repair Procedures:
Engine overhaul, transmission repair, suspension component replacement, brake caliper rebuild, carburetor/fuel injection cleaning and adjustment
Troubleshooting Guides:
Diagnostic procedures for common performance issues, electrical faults, and mechanical problems
Diagnostic Level:
Intermediate to Advanced, including torque specifications, clearances, and diagnostic fault codes (if applicable)
Rebuild Scope:
Comprehensive, covering complete engine, transmission, and suspension rebuilds
Engine Type:
Four-stroke, DOHC, single-cylinder
Bore X Stroke:
77.0 mm x 53.5 mm
Compression Ratio:
13.7:1 (typical, varies by year)
Horsepower Estimate:
40+ HP (approximate, peak at high RPM)
Torque Estimate:
20+ lb-ft (approximate, peak at mid-high RPM)
Fuel Delivery:
Electronic Fuel Injection (EFI), typically with Keihin throttle body (e.g., 43mm)
Fuel Type:
Unleaded gasoline, 91 octane or higher recommended
Oil Type Recommendation:
Suzuki recommends API SG+, JASO MA certified 10W-40 or 10W-50 motorcycle oil
Oil Capacity With Filter:
Approx. 0.7 - 0.8 Liters (check specific year)
Coolant Type:
Suzuki recommends a 50/50 mixture of ethylene glycol and demineralized water
Transmission Type:
Constant mesh, 5-speed sequential
Clutch Type:
Wet multi-plate, cable-actuated
Gear Ratios:
Specific ratios vary by year, detailed in manual (e.g., 1st: 2.5, 2nd: 1.8, 3rd: 1.4, 4th: 1.17, 5th: 1.0)
Final Drive:
Drive chain, typically 520 size
Transmission Oil Type:
Same as engine oil (API SG+, JASO MA certified 10W-40 or 10W-50)
Overall Length:
Approx. 2170 mm (varies by year)
Overall Width:
Approx. 825 mm (varies by year)
Overall Height:
Approx. 1250 mm (varies by year)
Dry Weight:
Approx. 100-105 kg (varies by year)
Curb Weight:
Approx. 106-110 kg (fully fueled, varies by year)
Fuel Tank Capacity:
Approx. 6.5 Liters (varies by year)
Safety Certification:
Not applicable for competition off-road motorcycles (designed for closed courses, not street legal)
Braking System:
Hydraulic disc brakes front and rear for powerful and modulated stopping
Suspension Tuning:
Adjustable front forks and rear shock absorber for optimizing handling and rider control
Ergonomics:
Designed for optimal rider positioning and control during aggressive riding
Infotainment System:
N/A (competition motorcycle, no standard infotainment features)
Driver Assistance Features:
N/A (competition motorcycle, no electronic rider aids like ABS or traction control)
Connectivity Features:
N/A (competition motorcycle)
Launch Control:
Some later models may feature electronic launch control, detailed in the manual
Engine Mapping Couplers:
Includes interchangeable fuel injection couplers to alter engine mapping for different track conditions (e.g., standard, aggressive, mellow)
Oil Change Interval:
Recommended every 8-15 hours of racing or approximately 20-30 hours of general use (check manual for specifics)
Air Filter Cleaning:
Recommended after every few rides, or more frequently in dusty conditions
Valve Clearance Check:
Recommended every 10-20 hours of racing or 30-50 hours of general use (critical for performance)
Spark Plug Replacement:
Check condition regularly, replace as needed based on performance degradation (typically 10-30 hours)
Engine Oil Capacity:
Approx. 0.7 Liters (dry) / 0.8 Liters (with filter replacement)
Fork Oil Type:
Specific viscosity and grade as per manual (e.g., Showa SS-8, KYB 01S, Motul Factory Line 5W)
Common Wear Items:
Clutch plates, brake pads, tires, sprockets, chain, wheel bearings, pivot bearings are common wear items in motocross
Engine Longevity:
Proper and frequent maintenance is crucial for engine longevity, especially valve clearance and oil changes, due to high-stress operation
Suzuki Offroad Legacy:
Suzuki has a long and successful history in motocross and off-road racing with numerous championships
Rmz Lineage:
The RM-Z250 is an evolution of Suzuki's highly successful RM and RM-Z motocross line, focusing on the competitive 250cc four-stroke class
Key Development Focus:
The model has seen continuous development in engine performance, chassis dynamics, and suspension technology to remain competitive
First Generation Year:
Introduced in 2004
Major Redesigns:
Significant redesigns and updates have occurred in various model years (e.g., 2007, 2010, 2015, 2019) to incorporate new technologies and improve performance
Industry Awards:
The RM-Z250 has historically received positive reviews and awards from motocross publications for its performance and handling.
Motocross Magazine Ratings:
Consistently rated highly by industry testers for engine power delivery, suspension, and chassis balance.
Racing Homologation:
Designed and built to meet FIM and AMA racing regulations for the 250cc class.
