Category:
Motocross / Off-Road Competition
Target Audience:
Amateur and professional motocross racers, off-road enthusiasts, mechanics specializing in performance dirt bikes.
Competitors:
Suzuki RM100, Yamaha YZ100 (though less direct competition in later years), Honda CR100 (discontinued earlier).
Vehicle Focus:
Lightweight, agile, powerful two-stroke engine for a class-leading power-to-weight ratio.
Manual Value Proposition:
Provides essential factory-level information for maintaining peak performance and executing repairs on the KX100 model range.
Engine:
Top End (Cylinder, Piston, Rings), Bottom End (Crankshaft, Connecting Rod, Bearings), Cooling System (Radiator, Hoses, Water Pump), Lubrication System (Oil Pump, Oil Circuit), Fuel System (Carburetor, Fuel Pump, Fuel Lines), Ignition System (CDI, Spark Plug, Ignition Coil), Exhaust System (Silencer, Exhaust Pipe)
Transmission:
Clutch (Operation, Adjustment, Replacement), Gearbox (Internal Components, Shifting Mechanism, Gear Ratios), Final Drive (Chain, Sprockets)
Chassis:
Frame, Swingarm, Suspension (Front Forks, Rear Shock Absorber - Damping, Rebuild, Adjustments), Steering System (Handlebars, Headstock Bearings)
Brakes:
Front and Rear Brake Systems (Hydraulic Lines, Calipers, Master Cylinders, Brake Pads, Brake Discs, Bleeding Procedures)
Electrical:
Wiring Diagrams, Lighting System, Charging System (Stator, Regulator/Rectifier), Ignition Switch, Kill Switch, Instrumentation (Tachometer, Speedometer)
Bodywork:
Fairings, Seat, Handlebars, Footpegs, Body Panel Removal and Installation
Maintenance:
Pre-ride Inspections, Oil Changes, Air Filter Cleaning/Replacement, Spark Plug Replacement, Chain Adjustment and Lubrication, Brake Pad Inspection, Coolant Checks, Carburetor Cleaning and Adjustment, Valve Clearance Checks (if applicable to 2-stroke design)
Troubleshooting:
Diagnostic Flowcharts, Common Problems and Solutions (e.g., starting issues, engine performance problems, electrical faults)
Repair:
Engine Rebuilds (Top and Bottom End), Transmission Overhaul, Suspension Servicing and Rebuilds, Brake System Repairs, Carburetor Rebuilds, Electrical Component Replacement, Clutch Replacement
Disassembly Reassembly:
Detailed step-by-step procedures for component removal and installation, torque specifications for critical fasteners.
Depth:
Factory-level detail, suitable for professional mechanics and experienced DIY enthusiasts. Covers complete engine teardowns and rebuilds, in-depth electrical system diagnostics, and suspension tuning.
Type:
Liquid-cooled, 2-stroke, Reed Valve
Displacement:
99 cc (Cubic Centimeters)
Bore X Stroke:
52.5 mm x 45.8 mm (Typical for this generation)
Compression Ratio:
Approximately 8.7:1 (for competition use, varies by specific model year tuning)
Horsepower:
Approximately 30-35 HP (estimated at crankshaft, varies by year)
Torque:
Approximately 15-17 lb-ft (estimated, varies by year)
Carburetor:
Keihin PWK34 (Typical specification, may vary slightly)
Fuel Type:
Unleaded Gasoline with 2-stroke oil premix (typically 32:1 or 40:1 ratio specified by Kawasaki)
Ignition System:
Digital CDI (Capacitor Discharge Ignition)
Cooling Method:
Liquid Cooling
Oil Change:
Every 15-20 hours of operation or annually. Manual specifies exact procedure and oil type.
Air Filter:
Clean/inspect after every few rides, replace as needed. Specific cleaning agent and lubrication oil mentioned in manual.
Spark Plug:
Replace every 20-30 hours of operation or inspect for fouling/wear. Manual specifies correct plug type and gap.
Chain Lubrication:
Lubricate and adjust chain tension every 5-10 hours of riding or after wet conditions. Manual provides tension specifications.
Engine Oil:
Kawasaki 2-stroke motorcycle oil or equivalent API TC, JASO FD certified oil. Mixing ratio specified (e.g., 32:1).
Coolant:
Kawasaki Coolant (or equivalent high-quality, ethylene glycol-based antifreeze) mixed with distilled water at a 50/50 ratio.
Brake Fluid:
DOT 3 or DOT 4 brake fluid.
Transmission Oil:
Kawasaki Motorcycle Gear Oil (or equivalent SAE 80 API GL-4) - Capacity: 0.7 Liters (0.74 US qt)
Common Wear Items:
Piston rings, clutch plates, wheel bearings, chain and sprockets, spark plugs, carburetor jets.
Potential Problems:
Carburetor jetting sensitivity to altitude and temperature, clutch wear from aggressive riding, occasional stator failure (though less common on this model).
Kawasaki Legacy:
Kawasaki has a long and successful history in motocross, consistently developing performance-oriented off-road machines.
Kx Lineage:
The KX100 is part of Kawasaki's highly regarded KX motocross line, known for its potent engines and competitive chassis. This generation built upon earlier KX80/KX85 designs, offering increased performance for junior and amateur riders moving up.
Manufacturing Location:
Japan (Typical for Kawasaki powersports)
Production Period:
The KX100 model has been in production for many years, with this specific manual covering the 2001-2010 iteration which saw consistent refinements.
