The Harley Davidson part number 65948-00 has had one upgrade since inception (65948-00A). However, several aftermarket manufacturers have improved upon the original specs and made a powerful sealed AGM version. Remember to take into account that the CCA is not the only metric you should pay attention to, the Ah is vitally important and arguably more important for a Harley motorcycle. If you can increase both these numbers from what the OEM specs indicate you know you have a solid battery that will stand the test of time.
Fits This Harley Bike
Many Harley riders ask for the ETX or MotoBatt brand. MotoBatt actually has two options with the MBYZ16HD being the top choice. However, if the MBYZ16HD is not available one could use the MBTX12U as a substitute. However you will want to purchase the MPT3 size terminals as the MBTX12U only comes with the MPT2 which are not flush mount like the MPT3 terminals.