Target Audience:
Enthusiast riders, amateur racers, mechanics, and owners seeking to perform their own maintenance and repairs
Value Proposition:
Provides comprehensive coverage for a decade of popular motocross models, offering significant cost savings over dealership service and enabling owners to maintain their bikes' performance and longevity.
Content Breadth:
Encompasses all major mechanical and electrical systems, offering detailed procedures for diagnosis, repair, and maintenance.
Model Year Span:
Covers an extensive 11-year production run, ensuring relevance for a wide range of KX85 and KX100 owners.
Accessibility:
Instant PDF download format makes it readily available on various devices.
Engine Top End:
Cylinder, cylinder head, piston, rings, combustion chamber inspection and repair
Engine Right Side:
Clutch assembly, ignition system components (stator, flywheel), gearbox side cover, water pump
Engine Bottom End Transmission:
Crankshaft, connecting rod, bearings, transmission gears, shift drum, clutch basket, torque specifications
Fuel System:
Carburetor assembly, jetting, fuel lines, fuel petcock, fuel tank maintenance
Cooling System:
Radiator, hoses, water pump, coolant specifications, bleeding procedures
Wheels Tires:
Wheel bearing inspection, spoke tensioning, tire pressure recommendations, tire replacement
Final Drive:
Chain adjustment, sprocket inspection and replacement, lubrication
Brakes:
Front and rear brake system maintenance, hydraulic fluid replacement, pad and caliper service, bleeding procedures
Suspension:
Front fork (cartridge, seals, oil, springs), rear shock absorber (rebuild, oil, gas pressure), linkage system service
Steering:
Steering head bearing service, handlebar replacement, throttle cable adjustment
Frame:
Frame inspection for damage, subframe integrity, footpeg mounting
Electrical System:
Ignition system troubleshooting, lighting (if applicable), battery maintenance, wiring diagrams
General Information:
Vehicle identification, safety precautions, torque specifications, tool requirements, general maintenance procedures
Appendix:
Troubleshooting guides, wiring diagrams, specifications charts, maintenance schedules
Preventative Maintenance:
Regular checks, fluid changes, lubrication, filter replacements, chain tensioning
Troubleshooting:
Diagnostic procedures for common and uncommon faults across all systems
Repair Procedures:
Step-by-step instructions for component disassembly, repair, reassembly, and adjustment
Engine Rebuilds:
Complete engine disassembly and reassembly, including bottom end and top end components
Suspension Servicing:
Fork and shock absorber disassembly, oil changes, seal replacement, tuning advice
Electrical Diagnostics:
Fault finding for ignition, charging (if applicable), and lighting systems using provided wiring diagrams
Diagnostic Capabilities:
Detailed diagnostic flowcharts and symptom-based troubleshooting for a wide range of issues
Repair Complexity:
Covers basic adjustments to complete engine and component overhauls
Specification Detail:
Provides critical torque values, clearances, fluid capacities, and wear limits
Engine Type:
Two-stroke, liquid-cooled, single-cylinder
Bore X Stroke Kx85:
48.5 mm x 45.8 mm (approximate, may vary slightly across years)
Bore X Stroke Kx100:
52.5 mm x 45.8 mm (approximate, may vary slightly across years)
Displacement Kx85:
84 cc (approximate)
Displacement Kx100:
99 cc (approximate)
Compression Ratio:
Typically around 8.5:1 to 9.5:1, specific value in manual
Reed Valve System:
Yes, for enhanced cylinder filling and performance
Horsepower Estimate Kx85:
Approx. 23-28 HP (at crankshaft, depending on year and tune)
Horsepower Estimate Kx100:
Approx. 28-33 HP (at crankshaft, depending on year and tune)
Carburetor Type:
Keihin PWK type (e.g., PWK28 for KX85, PWK30 for KX100, specific model dependent)
Fuel Requirement:
Unleaded gasoline, minimum octane rating typically 91 (RON+MON)/2
Oil Mixing:
Pre-mix fuel/oil ratio, typically 32:1 or 40:1 with 2-stroke racing oil
Oil Change Interval:
Gearbox oil: Recommended every 10-15 hours of riding or annually. Engine oil (pre-mix): Continuous during operation.
Air Filter Cleaning:
Recommended after every few rides, especially in dusty conditions.
Spark Plug Service:
Inspection and cleaning/replacement every 10-20 hours of riding.
Chain Maintenance:
Lubrication and adjustment every 5-10 hours of riding, or as needed.
Coolant Type:
High-quality ethylene glycol based coolant with a 50/50 mix of distilled water. Specific part numbers or recommendations in manual.
Fork Oil Type:
Specific fork oil grade (e.g., Showa SS-10, SAE 0W-30, or equivalent) and level are critical, detailed in manual.
Brake Fluid Type:
DOT 4 hydraulic brake fluid
Clutch Wear:
Clutch plates can wear due to aggressive riding; regular inspection and adjustment are recommended. Manual provides wear limits.
Power Valve Sticking:
Carbon buildup can cause the power valve to stick; regular cleaning is essential. Manual details removal and cleaning procedures.
Suspension Seals:
Fork and shock seals are wear items, especially under harsh off-road conditions. Manual provides seal replacement instructions.
