GUIDELINE FOR START BATTERY SELECTION – CHAPTER 1

These battery specifications are determined by the voltage and power of the starter motor. The starter motor, in turn, is determined by the engine’s displacement and the number of cylinders.

• The larger the engine displacement, the greater the starting current.
• For the same engine displacement, the fewer the cylinders, the greater the starting current.

Currently, Vibat classifies starting current according to the following levels:

• Motorcycles and gasoline engines up to 150cc, 1 cylinder: 12V – 50A – 2.5Ah
• Motorcycles and gasoline engines 300cc, 1 cylinder: 12V – 80A – 5Ah
• Motorcycles and gasoline engines up to 650cc, 2 cylinders; 900cc, 3 cylinders: 12V – 120A – 7.5Ah
• Motorcycles and gasoline engines up to 900cc, 2 cylinders; 1200cc, 3-4 cylinders: 12V – 160A – 10Ah
• Motorcycles and gasoline engines up to 1200cc, 2 cylinders; 1800cc, 4 cylinders; diesel engines up to 1.2L, 4 cylinders: 12V – 200A – 12Ah
• Gasoline cars 2.5L, diesel 2L, 4 cylinders: 12V – 320A – 15Ah
• Gasoline cars up to 5L, diesel 3.5L, 4 cylinders: 12V – 480A – 22Ah
• Diesel cars up to 7L, 6 cylinders: 12V – 640A – 30Ah
• Cars and diesel engines up to 9L: 24V – 320A – 15Ah
• Cars and diesel engines up to 15L: 24V – 480A – 22Ah
• Diesel engines up to 25L: 24V – 640A – 30Ah

However, the classification above is for reference only. When installing a specific starter battery, it is necessary to check the starter motor specification or measure the actual starting current to make the right decision.