Yuasa YB4L-B Yumicron 12-Volt Battery

Bring reliable starting muscle and consistent electrical power to your lightweight street bike, vintage moped, dual-sport, or small quad with the Yuasa YB4L-B Yumicron 12-Volt Battery. Specially engineered to meet the demanding ignition requirements of compact powersports engines, the Yumicron series features extra lead plates packed into each cell to deliver up to 30 percent more cranking power than standard conventional batteries. Whether you are kicking over a restored classic or prepping your daily urban commuter, Yuasa’s high-output grid design supplies the instant starting punch needed to get your motor running fast and clean. Built to handle the constant vibration and shock of powersports riding, the YB4L-B features a high-impact polypropylene container that shields delicate internal components from damage. Its specialized radial grid architecture optimizes electrical conductivity while minimizing internal resistance for swift energy transfer. Featuring translucent case walls that make routine visual fluid level checks fast and effortless, this compact 12V battery brings the perfect balance of small-frame machine compatibility, rugged durability, and proven Yuasa reliability to your ride.

• Special thin separators allow two extra plates per cell to be installed, for a 30 percent improvement in cranking performance
• Engineered to protect against corrosion, withstand vibration, and deliver high cranking power

Bring dependable starting power to lightweight motorcycles, vintage mopeds, dual-sport bikes, scooters, and small quad vehicles with the Yuasa Battery YB4L-B Yumicron 12-Volt Battery. Designed for compact powersports engines, this conventional battery uses specialized thin separators that allow additional lead plates in each cell, helping provide up to 30 percent more cranking performance than standard conventional battery designs. It is a practical choice for restoring classic machines, supporting everyday commuting, or replacing a worn battery in a small-frame powersports application.
The Yuasa YB4L-B is built for the vibration, shock, and demanding operating conditions associated with powersports use. Its high-impact polypropylene case helps protect internal components, while the radial grid design promotes efficient electrical conductivity and reduced internal resistance for quick energy transfer during starting. Translucent case walls make fluid level inspection easier during routine maintenance, helping you monitor the battery without unnecessary disassembly. This compact 12-volt battery combines strong starting performance, durable construction, and the trusted quality associated with Yuasa Battery products.
The Yumicron YB4L-B is designed for compatible applications including select Honda, Suzuki, and Yamaha models. Fitment includes the 1984–1985 Honda NQ50 Spree, 1986–1989 Suzuki SP200, 1989–1990 Yamaha CW50 Zuma, and 1997–1999 Yamaha CW50 Zuma II. Confirm your vehicle’s battery requirements and terminal configuration before installation. As a conventional powersports battery, it may require proper initial preparation and regular maintenance according to the manufacturer’s instructions.

Features:

• Up to 30 percent more cranking performance than standard conventional battery designs

• Special thin separators allow additional lead plates to be installed in each cell

• High-impact polypropylene case helps protect internal components from vibration and shock

• Radial grid design supports efficient electrical conductivity and quick starting power

• Translucent case walls simplify routine fluid level inspections

• Designed for select lightweight motorcycles, mopeds, scooters, dual-sport bikes, and small quads

Fitment:
Aprilia Mojito Custom 50 Base 2004
Aprilia Mojito Custom 50 Base 2005
Aprilia Rally 50 (Air Cooled) Base 1995
Aprilia Rally 50 (Air Cooled) Base 1996
Aprilia Rally 50 (Air Cooled) Base 1997
Aprilia Rally 50 (Air Cooled) Base 1998
Aprilia Rally 50 (Air Cooled) Base 1999
Aprilia Rally 50 (Air Cooled) Base 2000
Aprilia Rally 50 (Air Cooled) Base 2001
Aprilia Rally 50 (Air Cooled) Base 2002
Aprilia Rally 50 (Air Cooled) Base 2003
Aprilia Rally 50 (Air Cooled) Base 2004
Aprilia RS 250 Base 2000
Aprilia RS 250 Base 2001
Aprilia RS 250 Base 2002
Aprilia RS 50 Base 2002
Aprilia RS 50 Base 2003
Aprilia RS 50 Base 2004
Aprilia RS 50 Base 2005
Aprilia Scarabeo 50 Ditech Base 2001
Aprilia Scarabeo 50 Ditech Base 2002
Aprilia Scarabeo 50 Ditech Base 2003
Honda NQ50 Spree Base 1984
Honda NQ50 Spree Base 1985
Suzuki Sp200 Base 1986
Suzuki Sp200 Base 1987
Suzuki Sp200 Base 1988
Yamaha CW50 Zuma Base 1989
Yamaha CW50 Zuma Base 1990
Yamaha CW50 Zuma II Base 1997
Yamaha CW50 Zuma II Base 1998
Yamaha CW50 Zuma II Base 1999
Yamaha CW50 Zuma II Base 2000
Yamaha CW50 Zuma II Base 2001