Battery & Charging

Plain explanation

Stores electrical energy to start the engine and power lights when the engine is off.

Technical

12 V maintenance-free or conventional lead-acid (verify type). Charged by stator via regulator-rectifier when engine running.

Function & location

Provide cranking current and stabilise electrical system voltage.

Typically under seat or side panel — verify exact location for your year.

Connections

• Main fuse
• Starter relay
• ECU
• Lighting circuits
• Regulator-rectifier

Common wear & symptoms

• Sulfation from sitting discharged
• Terminal corrosion
• Low electrolyte (if serviceable type)
• Age-related capacity loss

• Slow cranking
• Clicking relay
• Lights dim at standstill
• Parasitic drain

Maintenance notes

• Keep terminals clean and tight
• Maintain charge during storage
• Use correct replacement spec from manual