The Harley Davidson part number 65958-04 has had a couple versions over the years. They append the letter A, B or C after the number when a newer version with perhaps higher crank is available. the physical size of the 65958-04 battery remains the same.
Remember to take into account that the Cold Cranking Amp or CCA is not the only metric you should pay attention to; the amp hour capacity or Ah is vitally important and arguably more important for a Harley Sportster motorcycle. If you can increase both these numbers from what the OEM specs indicated, you know you have a solid battery that will stand the test of time. Our Baseline AGM flush-mount Harley battery is the Magna Power EXT series by East Penn Deka the makers of the OEM battery. Our other advanced AGM product is provided by MotoBatt with two options available. The MBTX12U is the basic version that should be purchased with the MPT3 terminal adapter. The MBYZ16HD is a high amperage high CCA upgrade worth its weight in gold. It comes with both the regular MPT2 terminals and the MPT3 flush mount terminals.
Fits These Harley Bikes
There are not many sealed AGM Sportster battery options on the market, but we have found the best options for you! The Harley XL and XLH Sportster switched to the left hand negative terminal design and overall smaller battery in 2004. The previous version for years 1997-2003 was the 65989-97 battery. Bikes older than that most likely used the 65991-82B.