| Battery | Standard specific gravity | 1.25 to 1.29 at 20°C (68°F) | |
| Charging circuit without load | Standard current | 10 A or less | |
| Standard voltage | 13.2 to 14.8 V (when engine speed at 2000 rpm) |
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| Charging circuit with load | Standard current | 30 A or higher | |
| Generator rotor | Standard resistance | Slip ring - Slip ring (for 130 A Type) |
2.3 to 2.7 Ω at 20°C (68°F) |
| Slip ring - Slip ring (for 150 A Type) |
1.5 to 1.9 Ω at 20°C (68°F) | ||
| Slip ring - Slip ring (for 180 A Type) |
1.36 to 1.76 Ω at 20°C (68°F) | ||
| Standard resistance | Slip ring - Rotor core (for 130 A Type) (for 150 A Type) |
10 kΩ or higher | |
| Slip ring - Rotor core (for 180 A Type) |
10 MΩ or higher | ||
| Standard diameter | 14.2 to 14.8 mm (0.559 to 0.583 in.) | ||
| Minimum diameter | 14.0 mm (0.551 in.) | ||
| Generator brush holder | Standard exposed length | 9.5 to 11.5 mm (0.374 to 0.453 in.) | |
| Minimum exposed length | 4.5 mm (0.177 in.) | ||