Motorcycle Mechanics Course

Lesson 1 • Major Systems Overview

Introduces the engine, drivetrain, electrical, fuel, and chassis systems as an integrated whole. Builds the mental map students need to diagnose and repair effectively.

Lesson 2 • Service Manuals and Documentation

Explains how to navigate OEM service manuals, wiring diagrams, and parts catalogs. Accurate documentation use is the foundation of professional, repeatable repair quality.

Lesson 3 • Shop Safety and Personal Protection

Covers PPE requirements, fire prevention, chemical handling, and emergency procedures. Establishes the safety mindset required throughout all hands-on work in this course.

Lesson 4 • Tools, Fasteners, and Torque Specs

Teaches proper selection and use of hand tools, torque wrenches, and specialty tools. Correct fastener identification and torque application prevent damage throughout all repair work.

Lesson 1 • Two-Stroke Bottom-End and Seals

Addresses crankshaft, main bearings, and crank seals critical to two-stroke lubrication and compression. Seal failure is the leading cause of two-stroke performance loss.

Lesson 2 • Internal Combustion Principles

Explains thermodynamic cycles, air-fuel combustion, and pressure-to-power conversion. This theory underpins every engine diagnosis and repair task in subsequent chapters.

Lesson 3 • Two-Stroke Lubrication and Fuel Mix

Explains premix ratios, oil injection systems, and their effect on engine longevity. Correct lubrication prevents seizure and is essential before any two-stroke is returned to service.

Lesson 4 • Two-Stroke Cycle Operation

Details intake, compression, power, and exhaust events within a single crankshaft revolution. Students trace port timing and understand how two-stroke power delivery differs from four-stroke.

Lesson 1 • Four-Stroke Cycle and Valve Timing

Explains intake, compression, power, and exhaust strokes and camshaft timing relationships. Valve timing directly affects power output and is critical to correct engine assembly.

Lesson 2 • Cylinder Head and Valve Train Service

Covers valve removal, inspection, lapping, and seat reconditioning on single and multi-cylinder heads. Proper valve sealing is essential for compression and fuel efficiency.

Lesson 3 • Piston, Cylinder, and Rings

Addresses bore measurement, piston-to-wall clearance, ring installation, and cylinder reconditioning. Accurate measurement determines whether components can be reused or must be replaced.

Lesson 4 • Valve Clearance Adjustment

Teaches feeler gauge and shim-under-bucket adjustment methods for both SOHC and DOHC engines. Correct clearances prevent valve damage and maintain performance between service intervals.

Lesson 5 • Engine Break-In and Performance Verification

Establishes correct break-in procedures, initial startup checks, and post-rebuild performance testing. Proper break-in seats rings and bearings, maximizing rebuilt engine longevity.

Lesson 1 • Carburetor Tuning and Synchronization

Teaches pilot, needle, and main jet selection and multi-carb vacuum synchronization. Proper tuning eliminates flat spots and optimizes fuel economy across the RPM range.

Lesson 2 • Carburetor Types and Operation

Explains slide, CV, and flat-slide carburetor designs and their internal circuits. Understanding circuit interaction is prerequisite to accurate carburetor diagnosis.

Lesson 3 • Carburetor Disassembly and Cleaning

Covers systematic disassembly, ultrasonic and chemical cleaning, and jet inspection procedures. Thorough cleaning is the most common fix for fuel delivery faults.

Lesson 4 • EFI Sensor Diagnosis and Fuel Trim

Covers TPS, MAP, IAT, and O2 sensor testing and their effect on fuel trim values. Sensor faults are the primary cause of EFI performance complaints and must be isolated accurately.

Lesson 1 • Ignition System Principles

Explains CDI, TCI, and coil-on-plug ignition architectures and their triggering mechanisms. Ignition system knowledge is prerequisite to no-start and misfire diagnosis.

Lesson 2 • Wiring Harness and Connector Repair

Teaches wire repair, connector pin extraction, terminal crimping, and harness routing standards. Proper harness repair prevents intermittent faults that are difficult to reproduce and diagnose.

Lesson 3 • Charging System Service

Covers stator output testing, rectifier-regulator diagnosis, and battery load testing. A healthy charging system is essential for reliable EFI and electronic accessory operation.

Lesson 4 • Ignition Component Testing

Teaches resistance, voltage, and oscilloscope testing of coils, pickups, and CDI units. Accurate component testing prevents unnecessary parts replacement and reduces diagnostic time.

Lesson 1 • Air-Cooled Engine Thermal Management

Explains fin condition, oil cooler function, and heat management strategies for air-cooled engines. Fin damage and blocked oil coolers cause localized overheating and accelerated wear.

Lesson 2 • Exhaust System Inspection and Repair

Covers header, mid-pipe, muffler, and catalytic converter inspection, leak testing, and replacement. Exhaust leaks alter back-pressure, affecting power output and emissions compliance.

Lesson 3 • Engine Lubrication System Service

Covers oil pump inspection, pressure testing, filter replacement, and oil specification selection. Correct lubrication prevents bearing and camshaft wear, the most costly engine failures.

Lesson 4 • Emissions Systems and Compliance

Introduces evaporative emission controls, secondary air injection, and exhaust gas standards. Understanding emissions systems prevents improper modifications that cause regulatory non-compliance.

Lesson 1 • Chain Drive Service and Adjustment

Teaches chain slack measurement, sprocket wear assessment, and master link installation. Neglected chain drive is the most common cause of preventable drivetrain failure.

Lesson 2 • Manual Gearbox Inspection and Rebuild

Covers gear, shift fork, shift drum, and bearing inspection and replacement in constant-mesh transmissions. Gearbox faults cause missed shifts and can strand riders if not corrected.

Lesson 3 • Belt Drive Inspection and Replacement

Addresses belt tension, pulley wear, and belt replacement intervals for primary and final belt drives. Belt failure causes immediate loss of drive and is preventable with scheduled inspection.

Lesson 4 • Shaft Drive and Bevel Gear Service

Covers shaft drive oil changes, universal joint inspection, and bevel gear backlash adjustment. Shaft drives require less frequent service but cause severe damage when neglected.

Lesson 1 • Hydraulic Brake System Overhaul

Covers master cylinder, caliper, and brake line inspection, rebuild, and bleeding procedures. Hydraulic brake integrity is the most critical safety system on any motorcycle.

Lesson 2 • Rear Suspension Service

Addresses mono-shock and twin-shock disassembly, linkage bearing inspection, and spring and damping adjustment. Rear suspension setup affects traction, stability, and rider comfort.

Lesson 3 • Frame and Steering Head Inspection

Covers frame crack detection, steering head bearing inspection, and head bearing preload adjustment. Frame and steering integrity are the foundation of safe motorcycle handling.

Lesson 4 • Wheel, Tire, and Bearing Service

Teaches wheel bearing replacement, tire mounting, balancing, and spoke tension adjustment. Wheel and tire condition directly affect braking distance and cornering stability.

Lesson 5 • ABS and Traction Control Diagnosis

Introduces ABS wheel speed sensor testing, modulator inspection, and fault code retrieval. Modern safety systems require scan tool competency to diagnose and restore correctly.