Segment:
Entry-level off-road/trail motorcycle
Target Audience:
Beginners, youth riders, casual trail enthusiasts
Key Competitors:
Honda CRF100F, Kawasaki KLX110, Suzuki DR-Z125
Design Philosophy:
User-friendly, reliable, approachable off-road performance
Engine Type:
Air-cooled, 4-stroke, SOHC
Transmission:
5-speed manual
Suspension Setup:
Long-travel for off-road capability
Engine:
Complete overhaul, disassembly, reassembly, tuning, diagnostics
Fuel System:
Carburetor adjustment and cleaning, fuel lines, fuel tank maintenance
Transmission:
Clutch operation, gear shifting mechanism, lubrication
Electrical System:
Ignition system, lighting, charging system, wiring diagrams, troubleshooting
Suspension:
Front fork service, rear shock absorber maintenance, spring replacement
Brakes:
Brake lever, caliper, pad inspection and replacement, brake fluid service
Cooling System:
Air cooling system inspection and cleaning
Frame And Bodywork:
Chassis inspection, seat removal, fender maintenance
Wheels And Tires:
Tire pressure checks, spoke tension adjustment, wheel bearing service
Maintenance:
Regular inspection, lubrication, filter replacement, spark plug replacement
Troubleshooting:
Diagnostic charts, common problems and solutions
Repair:
Step-by-step instructions for component repair and replacement
Disassembly Reassembly:
Detailed guidance for complete engine and component breakdown
Adjustments:
Carburetor idle speed, clutch lever free play, chain tension
Depth:
Comprehensive, from basic maintenance to full engine rebuilds and advanced diagnostics
Engine Type:
Air-cooled, four-stroke, SOHC, 2-valve
Bore X Stroke:
54.0 mm x 54.5 mm
Horsepower Approximate:
10-12 HP @ 8000 RPM (Estimate, actual may vary by tuning)
Torque Approximate:
9-10 Nm @ 6500 RPM (Estimate, actual may vary by tuning)
Carburetor:
Mikuni VM20SS or similar
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
5.0 Liters (1.3 Gallons)
Oil Change:
Every 1,000 km or 6 months (refer to manual for specifics)
Spark Plug Inspection:
Every 2,000 km
Air Filter Cleaning:
Every 500 km or as needed in dusty conditions
Valve Clearance Check:
Every 4,000 km
Engine Oil Type:
Yamalube 4 (or equivalent SAE 10W-30 API SE, SF, SG type oil)
Engine Oil Capacity:
0.95 Liter (1.0 US qt) without filter change; 1.0 Liter (1.1 US qt) with filter change
Brake Fluid Type:
DOT 3 or DOT 4
Common Wear Items:
Clutch plates, brake pads/shoes, chain and sprockets, air filter degradation
Carburetor Idling:
Can sometimes be prone to sticking or requiring frequent adjustment if not kept clean.
Electrical Connections:
Corrosion or loose connections can occur in off-road environments; requires regular inspection.
Manufacturer:
Yamaha Motor Corporation
Reputation:
Longstanding reputation for reliability and performance in motorcycles, including off-road segments.
Introduction Year:
Introduced to broaden Yamaha's trail bike lineup for younger riders.
Key Updates For 2004:
Often minor styling tweaks or component refinements; core design remained consistent.
Manufacturing Location:
Primarily Japan or Indonesia
