Yuasa has been a premier battery brand for many years in the vintage motorcycle industry. This conventional battery kit is supplied with an acid pack for activation prior to putting the battery into service. Suitable for use in most British motorcycles with kickstarters and 12 volt electrical systems.
Manufactured to the standard 12N9-4B1 dimensions, this battery is 5-5/16″ wide, 5-1/2″ tall, and 3″ deep. Featuring sealed posts and special thin separators that allow for increased plate surface area that maximizes starting capacity.
The battery is the heart of the electrical system and supplies current to the ignition and lighting systems. A functioning charging system keeps the battery charged and the integrity of the electrical connections are paramount for a reliable electrical system in a vintage motorcycle.
The battery resides under the seat on most British motorcycles. The leads are generally connected to the battery terminals with ring terminals. A battery tray rubber pad is fitted under the battery, with a securing strap and hold-down buckle used to retain the battery in the carrier.
Key Specifications
- Voltage: 12V
- Capacity: 9 Ah (10-hour rate)
- Dimensions: 5 5/16″ x 3″ x 5 1/2″ (135mm x 75mm x 139mm)
- Weight: 5.4 lbs (2.45 kg)
- Type: Conventional (flooded lead-acid)
Performance Features
- Durable Construction: Built with tough polypropylene covers and containers to withstand vibration and harsh conditions.
- Enhanced Cranking Power: Provides up to 30% more cranking power compared to standard conventional batteries.
- Sealed Posts: Resist corrosion for improved longevity and reliability.
- Special Separators: Thin, high-tech separators allow for increased plate surface area maximizing starting capacity.
Application and Usage
The Yuasa Y12N9-4B-1 is suitable for various powersports vehicles including:
- Motorcycles
- ATVs
- Scooters
- Personal watercraft
This battery is ideal for vehicles that don’t require an AGM (Absorbed Glass Mat) battery and have charging systems with lower voltage outputs.
Maintenance and Installation
- Acid Pack Included: Comes with a separate acid pack for activation before first use.
- Initial Charging Required: Must be filled with acid and charged before installation.
- Maintenance: Periodic electrolyte level checks and water top-ups may be necessary
Please note: Due the nature of the product, we unfortunately do not accept returns on bearings, service tools or electrical components. Please be confident about your purchase before ordering. If you have questions, please contact us.