Complete Motorcycle Mechanics Course

Lesson 1 • Motorcycle Anatomy Overview

Identifies all major motorcycle systems and their spatial relationships on the machine. Provides the vocabulary and mental map needed for diagnostic and repair tasks.

Lesson 2 • Shop Safety and Personal Protection

Covers fire prevention, chemical handling, and PPE selection in a motorcycle shop. Establishes the safety baseline required for all subsequent hands-on work.

Lesson 3 • Service Documentation and Manuals

Explains how to read factory service manuals, wiring diagrams, and parts catalogs. Proper documentation use ensures repairs meet manufacturer specifications throughout the course.

Lesson 4 • Power Tools and Shop Equipment

Introduces impact drivers, drill presses, bench grinders, and hydraulic lifts. Safe operation of shop equipment prevents injury and protects motorcycle components.

Lesson 1 • Two-Stroke Top-End Service

Teaches cylinder removal, piston measurement, ring replacement, and honing procedures. Top-end service restores compression and power output to specification.

Lesson 2 • Internal Combustion Engine Principles

Covers thermodynamic cycles, pressure-volume relationships, and power stroke mechanics. This theory supports accurate diagnosis of engine performance problems in all chapters.

Lesson 3 • Two-Stroke Performance Diagnosis

Uses compression testing, leak-down testing, and exhaust analysis to locate two-stroke faults. Systematic diagnosis prevents unnecessary disassembly and reduces repair time.

Lesson 4 • Two-Stroke Bottom-End Service

Covers crankcase splitting, crankshaft inspection, and main bearing replacement. Bottom-end integrity is critical to sealing and power delivery in two-stroke engines.

Lesson 1 • Crankshaft, Bearings, and Engine Assembly

Covers main bearing clearance measurement, crankshaft end-play, and final assembly torque sequences. Correct assembly ensures oil film integrity and long engine life.

Lesson 2 • Cylinder Head Removal and Inspection

Covers head bolt loosening sequences, gasket removal, and surface flatness measurement. Proper inspection prevents repeat head gasket failures after reassembly.

Lesson 3 • Piston, Cylinder, and Connecting Rod Service

Measures bore wear, piston-to-wall clearance, and rod big-end play to determine oversize requirements. Accurate measurement prevents premature engine failure after overhaul.

Lesson 4 • Valve Service and Seat Grinding

Teaches valve lapping, seat angle grinding, and spring pressure testing. Correct valve seating restores compression and prevents hot-spot burning.

Lesson 1 • Carburetor Theory and Circuit Operation

Explains float, pilot, main, and enrichment circuits and their throttle-position roles. Circuit theory enables pinpoint diagnosis without unnecessary carburetor replacement.

Lesson 2 • Fuel Injection System Components

Identifies throttle body, injectors, fuel pump, pressure regulator, and sensors in EFI systems. Component identification is required before any EFI diagnostic procedure.

Lesson 3 • EFI Diagnosis with Scan Tools

Uses diagnostic scan tools to read fault codes, live data, and fuel trim values. Data-driven diagnosis reduces guesswork and correctly identifies EFI system faults.

Lesson 4 • Air Intake and Exhaust System Service

Covers air filter service, intake boot inspection, and exhaust system leak detection. Intake and exhaust condition directly affects fuel system calibration and engine output.

Lesson 1 • Starting System Diagnosis and Repair

Diagnoses starter motor, solenoid, relay, and inhibitor switch faults using voltage and current tests. Correct starting system function is essential for safe engine operation.

Lesson 2 • Ignition System Types and Service

Covers CDI, TCI, and coil-on-plug ignition systems, including timing and spark output testing. Correct ignition timing directly affects power, fuel economy, and emissions.

Lesson 3 • Battery and Charging System Service

Tests battery state of charge, load capacity, and alternator output voltage and current. A healthy charging system is prerequisite to accurate ignition and EFI diagnosis.

Lesson 4 • Lighting, Instrumentation, and Accessory Circuits

Traces lighting, instrument cluster, and accessory circuits using wiring diagrams and a multimeter. Systematic tracing locates opens, shorts, and high-resistance faults efficiently.

Lesson 1 • Dry Clutch and Automatic Clutch Systems

Services single-plate dry clutches and centrifugal automatic clutch assemblies found on scooters and small-displacement bikes. Correct service restores smooth engagement.

Lesson 2 • Transmission Theory and Gear Selection

Explains constant-mesh gear engagement, shift fork operation, and detent mechanisms. Gear selection theory is required before any transmission disassembly procedure.

Lesson 3 • Chain, Belt, and Shaft Final Drive

Covers chain stretch measurement, sprocket wear, belt tension, and shaft drive gear lash. Proper final drive maintenance prevents catastrophic power loss and wheel lockup.

Lesson 4 • Wet Clutch Service and Adjustment

Measures friction and steel plate thickness, spring free-length, and basket runout. Correct clutch adjustment eliminates slipping and dragging under load.

Lesson 1 • Conventional Fork Service

Covers fork tube removal, seal and bushing replacement, oil level measurement, and reassembly. Correct fork oil level and seal condition restore front-end damping performance.

Lesson 2 • Suspension Theory and Geometry

Explains spring rate, damping, rake, trail, and wheelbase effects on handling. Geometry knowledge is required to correctly diagnose handling complaints before disassembly.

Lesson 3 • Inverted Fork and Cartridge Fork Service

Services USD forks and cartridge damper assemblies requiring specialized tools and procedures. Cartridge service restores independent compression and rebound adjustment capability.

Lesson 4 • Rear Suspension and Linkage Service

Rebuilds mono-shock absorbers, linkage bearings, and swingarm pivot bearings. Worn linkage bearings cause vague rear-end feel and accelerate tire and chain wear.

Lesson 1 • Brake System Theory and Hydraulics

Explains Pascal's law, mechanical advantage, and brake bias in motorcycle braking systems. Hydraulic theory is the foundation for all brake diagnosis and bleeding procedures.

Lesson 2 • Master Cylinder and Brake Line Service

Rebuilds master cylinders, inspects brake hoses for swelling, and replaces stainless braided lines. Master cylinder condition directly controls pedal feel and hydraulic pressure output.

Lesson 3 • Drum Brakes and ABS System Service

Services drum brake shoes, wheel cylinders, and cables, then introduces ABS modulator diagnosis. ABS fault codes and wheel speed sensor testing prevent unnecessary modulator replacement.

Lesson 4 • Rotor and Pad Inspection and Replacement

Measures rotor thickness, runout, and pad friction material depth against service limits. Rotors below minimum thickness cause brake fade and risk catastrophic failure.