These motorcycle technical articles form the Engineering Explained series. Based on more than 400,000 miles of riding, maintaining and restoring motorcycles, Gary explains the engineering principles behind common workshop tasks, fault diagnosis and motorcycle maintenance in a clear and practical way.
Each article is intended to complement the Technical Library and help fellow riders diagnose, maintain and repair their motorcycles with confidence.
- Chain, Belt or Shaft Drive: Which Final Drive System Is Best? An engineering explanation of chain, belt and shaft final drive systems, comparing efficiency, maintenance, reliability and suitability for different styles of riding.
- How Motorcycle Charging Systems Work (and Why Batteries Go Flat) How your motorcycle charging system works, how the alternator, regulator/rectifier and battery work together, and how to diagnose common charging faults.
- Motorcycle Battery – Why Batteries Fail (and How to Make Them Last) An engineering guide explaining motorcycle battery failure, maintenance and how to maximise battery life.
- Motorcycle Engine Wear – Why Most Engines Never Wear Out Discover what causes motorcycle engine wear, why most modern engines never truly wear out, and the maintenance practices that maximise engine life.
- Understanding Dry Sump Lubrication: Why It Isn’t as Complicated as You Think A straightforward guide to how dry sump systems work and why they’re used.
- Why Motorcycle Chains Don’t Stretch (and What Really Causes Chain Wear) Discover why motorcycle chains don’t actually stretch, where wear really occurs, and how correct cleaning, lubrication and adjustment can significantly extend the life of your final drive.
- Why Motorcycle Exhaust Headers Turn Blue (and Why It’s Usually Normal) Understanding exhaust heat colours, air–fuel mixtures and when blueing is perfectly normal.
- Why Motorcycle Gearboxes Clunk into First (and Why It’s Usually Normal) Explains wet clutches, gearbox design and why that reassuring “clunk” isn’t a fault.
What You’ll Find Here
Unlike workshop manuals, which often assume prior knowledge, these motorcycle technical articles explain the theory behind the components you’ll encounter while servicing or repairing your motorcycle.
Topics include:
- Engine design and lubrication
- Electrical systems and charging
- Final drive systems
- Clutches and gearboxes
- Suspension and steering
- Braking systems
- Wheels and tyres
- Bearings and seals
- Motorcycle materials and engineering
- Fault diagnosis and preventative maintenance
Every article is written to be easy to understand without sacrificing technical accuracy.
Why These Articles Are Different
Much of the technical information available online is copied from workshop manuals or repeated across forums without explaining the underlying engineering.
Engineering Explained takes a different approach. Every article is based on practical workshop experience and explains not only how components work, but also why manufacturers designed them that way. Where common myths exist, they are addressed using engineering principles rather than opinion.
The aim is to help riders understand their motorcycles rather than simply follow instructions.
Who These Articles Are For
Engineering Explained is written for:
- Motorcyclists who enjoy maintaining their own machines.
- Riders wanting to understand how their motorcycles work.
- Owners diagnosing faults before replacing expensive parts.
- Students and apprentices learning motorcycle engineering.
- Anyone interested in the engineering behind motorcycles.
No specialist knowledge is assumed, although experienced mechanics should also find useful technical insights.
Why Understanding Engineering Matters
Modern motorcycles are remarkably reliable, but many expensive repairs result from replacing parts before identifying the real cause of a fault. Understanding how individual systems work allows problems to be diagnosed logically rather than by trial and error. Whether checking a charging system, investigating an oil leak or understanding gearbox behaviour, a little engineering knowledge often saves both time and money.
Built on Practical Experience
Every article in Engineering Explained is written from practical experience rather than simply repeating information from workshop manuals. Over more than 400,000 miles of riding, servicing, restoring and maintaining motorcycles, countless faults have been investigated and repaired. That real-world experience is combined with engineering principles to produce articles that are both technically accurate and easy to understand. The aim is to give riders the confidence to maintain their own motorcycles and better understand the machines they ride.
What You’ll Learn
Examples of topics covered include:
- Electrical charging systems
- Alternators and regulator/rectifiers
- Wet and dry sump lubrication
- Clutches and transmissions
- Gearbox design
- Final drive systems
- Motorcycle chains
- Bearings and seals
- Suspension principles
- Brake systems
- Cooling systems
- Fuel injection
- Engine wear
- Routine maintenance
- Common faults and diagnosis