| engine size | model | year | best | better | good | standard |
|---|---|---|---|---|---|---|
| 883cc | XL, XLH (Sportster) | '04-'11 | YTX14L | - | - | - |
| XL, XLH (Sportster) | '97-'03 | PC545 | YTX20HL | YTX20L | ETX20L | |
| XLH (Sportster) | '86-'96 | PC535 | YTX20H | YTX20 | YB16-B-CX | |
| 500cc | MT500 (Military) | All Years | YTX14AHL | ETX15L | YB14L-A2 | - |
