Safety and liability disclaimer

01Work at your own risk

Moto Zero teaches how motorcycles work and how they are maintained and repaired. Working on a motorcycle can be dangerous: hot parts, fuel, battery acid, moving wheels and chains, heavy machines that can fall, and brakes or steering that fail if they are put back wrong. You decide whether to do a job and you carry the responsibility for doing it safely. Do not ride a motorcycle you have worked on until you are sure it is safe.

02Use the manual for your bike

Job sheets, procedures and reference values on this site are general guidance for learning. Every model is different. Before you work on a motorcycle, look up the manufacturer's service manual or owner's manual for that exact machine and follow its procedures, torque settings, service limits, fluids and safety instructions. Where the manual and this site differ, the manual is right.

03Example values (K-Light 125)

Many pages give example figures marked K-Light 125, for a typical 125 cc commuter motorcycle. They are there to show what a real specification looks like and how to read a test result. They are examples, not the specification of your motorcycle, and must not be used instead of the figures in your own manual. The same applies to values in the interactive tools, which are teaching approximations.

04When to go to a workshop

Take the motorcycle to a qualified mechanic or the dealer if:

• the job involves brakes, steering, wheels, suspension or tyres and you have not done it before under supervision;
• you do not have the right tools, a torque wrench, a stand or the manual;
• the job needs special equipment, such as wheel balancing, valve seat cutting, welding or ABS work;
• you are not sure what you found, or the fault comes back after a repair;
• the motorcycle is electric and the work is on the high-voltage battery, motor, controller or cabling;
• the motorcycle is under warranty, or the law requires a qualified workshop or an inspection.

05Electric motorcycles and high voltage

The traction systems of electric motorcycles can carry voltages and currents that kill, even when the motorcycle is switched off. Only people who are trained and authorised for high-voltage work, with the right insulated tools and protective equipment, may open or work on these parts, following the manufacturer's isolation procedure. Module 05 and the Wiring Lab explain the principles; they do not qualify anyone to do the work.

06Basic safety

• Work on a stable, level surface, with the motorcycle on a stand that suits it.
• Let the engine and exhaust cool down. Never run an engine in a closed room.
• No smoking or open flame near fuel; keep an extinguisher nearby.
• Wear eye protection and gloves; dispose of oil, coolant, brake fluid and batteries at a collection point.
• Test brakes and controls at walking pace before you ride.

07Liability

The material is provided free of charge and as it is. We work to keep it accurate but cannot guarantee that it is complete, current or free of errors. To the extent the law allows, Transitions Lab accepts no liability for injury, loss or damage resulting from work carried out with the help of this site, from following comments or videos posted by others, or from errors in the material. This does not limit liability that cannot be limited by law. See the terms of use.

08Found an error?

If a value or a step looks wrong, please tell us so we can correct it for everyone: use the contact form or email the team at marcel@transitionslab.org. Name the page and, if you can, the manual or source.

Last updated 6 November 2026.