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12 Volt YT9B-4 & GT9B-4 Scooter & Motorcycle Battery (Premium)

12 Volt YT9B-4 & GT9B-4 Scooter & Motorcycle Battery (Premium)
Item #: B77-8445
Regular Price:$72.99
Sale Price:$63.99
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This battery is used on the Yamaha 400cc YP400 Majesty scooter and Yamaha 600cc YZF-R6, R6S and Yamaha 750cc YZF-R7 motorcycles.

This is a Premium quality battery from WestCo Battery.

AGM batteries offer the following advantages over conventional batteries:

  • Sealed maintenance free design means you don’t have to worry about checking water levels.
  • AGM technology will not leak or corrode on paint and chrome.
  • They have less internal resistance which offers more CCA amperage than wet batteries.
  • By nature AGM batteries are more heat and vibration resistant than conventional batteries, both which contribute to the large majority of failures in motorcycle applications.
  • Slower self discharge rate (longer shelf life) means battery can sit for extended periods of time without constant monitoring.


  • The sealed AGM battery requires very little maintenance during storage. The advanced technology eliminates the need to monitor and maintain water levels. The sealed design means much longer periods between charges when the battery is inactive.
    Voltage: 12 Volts
    Amp Hour: 8 Ah
    Cold Cranking Amps (CCA): 115
    Length: 6"
    Width: 2-3/4"
    Height: 4-1/8"
    Weight: 7.5 lb.
    Equivalent Brand Part Numbers:
  • Yuasa YT9B-4 Battery
  • GS-Ztong Yee GTX9-BS & GT9B-4 Batteries


  • Known Compatibility:
    Scooters
  • Yamaha YP400 Majesty


  • Motorcycles
  • Yamaha YZF-R6
  • Yamaha R6S
  • Yamaha YZF-R7


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