Target Audience:
Enthusiast ATV owners, independent repair shops, and dealership service technicians.
Niche Appeal:
Caters to riders seeking a lightweight, nimble sport ATV for trail riding and recreational use.
Competitors:
Primarily competes with similar displacement ATVs from Honda (e.g., TRX250X), Suzuki (e.g., LT-Z250), and Kawasaki (e.g., KFX250).
Model Selling Points:
Lightweight chassis, agile handling, reliable Yamaha engine, beginner-friendly power delivery, suitable for younger riders or those new to sport ATVs.
Engine Mechanical:
Detailed procedures for disassembly, inspection, repair, and reassembly of the engine components, including cylinder head, piston, crankshaft, and valve train.
Engine Fuel System:
Covers carburetor (likely a Keihin CVK type), fuel pump (if applicable), fuel lines, and related adjustments and troubleshooting.
Engine Ignition System:
Information on CDI unit, ignition coil, spark plug, wiring diagrams, and troubleshooting ignition issues.
Engine Lubrication System:
Details on oil pump, oil filter, oil passages, and oil change procedures and specifications.
Cooling System:
Covers air-cooling system components, fan (if equipped), and related maintenance. (Raptor 125 is typically air-cooled).
Transmission Drivetrain:
Explains gearbox disassembly, repair, clutch operation, and final drive (chain drive) maintenance and adjustments.
Suspension System:
Detailed procedures for front and rear suspension components, including shocks, springs, A-arms, linkages, and adjustments.
Braking System:
Covers hydraulic brake system, including master cylinders, calipers, brake pads, discs, brake lines, bleeding procedures, and adjustments.
Electrical System:
Comprehensive wiring diagrams, troubleshooting guides for electrical circuits, lighting, battery, starter system, and charging system.
Chassis Frame:
Information on frame inspection, repairs, and related components.
Steering System:
Covers steering column, tie rods, steering knuckles, and adjustments.
Bodywork Plastics:
Instructions for removal, installation, and repair of body panels, fenders, and plastics.
Preventive Maintenance:
Detailed schedules and procedures for routine checks, lubrication, adjustments, and component replacements at specified intervals.
Troubleshooting:
Systematic diagnostic charts and common issue identification for engine, electrical, and chassis problems.
Engine Rebuild:
Step-by-step guides for complete engine overhaul, including torque specifications, clearances, and tolerances.
Transmission Repair:
Detailed procedures for gearbox disassembly, component inspection, and reassembly.
Carburetor Adjustment Rebuild:
Instructions for cleaning, rebuilding, and adjusting the carburetor for optimal performance.
Suspension Tuning:
Guidance on adjusting suspension settings for different riding conditions and rider preferences.
Electrical Diagnostics:
Schematics and troubleshooting methods for all electrical systems, including lighting, starting, and charging.
Wheel Tire Service:
Procedures for tire replacement, wheel balancing, and bearing maintenance.
Depth:
Comprehensive, covering from basic maintenance to complete engine and chassis rebuilds. Includes detailed specifications, tolerances, and diagnostic procedures.
Diagnostic Tools Required:
Mentions standard mechanic's tools, torque wrenches, feeler gauges, multimeter, and potentially specialized tools for specific tasks (e.g., valve spring compressor).
Engine Type:
Single-cylinder, 4-stroke, SOHC
Bore X Stroke:
Typically around 52.5 mm x 57.7 mm (specific for 2011 Raptor 125).
Cooling System:
Air-cooled
Compression Ratio:
Typically around 9.5:1 to 10.0:1.
Horsepower:
Estimated 10-12 HP (actual figures often not officially published, but typical for this class).
Torque:
Estimated 7-8 lb-ft (typical for this class).
Fuel Delivery:
Carburetor (e.g., Keihin CVK 33)
Fuel Type:
Unleaded gasoline, 87 octane or higher.
Fuel Tank Capacity:
Typically around 2.0 - 2.5 gallons (7.6 - 9.5 liters).
Length:
Typically around 68.9 inches (1750 mm).
Width:
Typically around 43.7 inches (1110 mm).
Height:
Typically around 41.9 inches (1065 mm).
Wheelbase:
Typically around 49.2 inches (1250 mm).
Dry Weight:
Typically around 300 lbs (136 kg).
Curb Weight:
Includes all necessary fluids and a full tank of fuel, typically around 315 lbs (143 kg).
Rack Capacity Front:
Typically rated for light loads, often around 20-25 lbs (9-11 kg).
Rack Capacity Rear:
Typically rated for light loads, often around 40-45 lbs (18-20 kg).
Oil Change Interval:
Typically every 100 hours or annually, whichever comes first. Refer to manual for specific hours.
Air Filter Cleaning:
Recommended every 20-30 hours or after dusty riding. Manual will detail specific cleaning/replacement procedures.
Spark Plug Replacement:
Typically recommended around 100-200 hours or as per manual inspection. Specific plug type (e.g., NGK CR7E) will be listed.
Chain Lubrication Adjustment:
Recommended every 20-30 hours or after riding in wet conditions. Manual will specify proper chain slack.
Engine Oil Type:
Yamaha recommends Yamalube 4 (or equivalent) SAE 10W-40 or 20W-40 API SG or higher, SE, or SF.
Engine Oil Capacity:
Typically around 1.4 - 1.6 liters (1.5 - 1.7 US qt) with oil filter change. Exact capacity in manual.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Transmission Oil Type:
Integrated with engine oil. Manual specifies oil type and capacity for the engine/gearbox.
Common Wear Items:
Brake pads, tires, chain and sprockets, air filter, spark plug, and battery are common wear items on any ATV.
Potential Durability Concerns:
As a 125cc model, it may be subject to harder use than intended if ridden by larger or more aggressive riders, potentially leading to premature wear on clutch or engine components. The manual is crucial for proper maintenance to mitigate this.
Carburetor Tuning:
Carburetors can be sensitive to altitude and temperature changes, requiring occasional adjustments or cleaning. The manual will detail this.
