The OEM battery for the 2007--2012 Tiger1050 is a Yuasa YTX12-BS. Most riders on this forum recommend replacing with a battery that has more Cold Cranking Amps. The Yuasa YTZ14S is the more popular one recommended. Some have or are using a Lithium/Iron battery, and at least a couple are using a Gel battery. Your numbers with the letter B immediately after the letter Y sounds to me like someone is recommending you use the OEM battery for the EFI Triumph Bonnevilles...since I don't have one I can't remember that number--the Bonnevilles prior to the EFI models used the same OEM battery as the OEM battery in the Triumph Tiger1050. This battery works very well in my '03 Bonneville; however, it is NOT up to the task for the high compression Tiger1050 motor--I use a Yuasa YTZ14S in my Tiger.
I recommend you purchase a battery tender (smart charger) device and use it when not riding, and expect to replace the battery you just purchased with a Yuasa YTZ14S in a couple of years or sooner.