In short
- 12 V · 9 Ah · 115 A EN
- 137 × 77 × 141 mm · + left
- Satkit replacement: OUTDO YB9-BS
The YB9-B is a 12 V conventional flooded motorcycle battery from the YuMicron series: 9 Ah, 115 A cold cranking amps (EN) and a casing measuring 137 × 77 × 141 mm. It has the positive terminal on the left when viewed with the label facing you.
Dimensions and specifications
| YB9-B | OUTDO YB9-BS | |
|---|---|---|
| Voltage | 12 V | 12 V |
| Capacity | 9 Ah (10 h) · 9.5 Ah (20 h) | 9 Ah (10 h) |
| Cold cranking amps | 115 A (EN) | 120 A at −18 °C |
| Length × width × height | 137 × 77 × 141 mm | 135 × 75 × 139 mm |
| Polarity | Positive terminal on the left | Positive terminal on the left |
| Technology | Conventional flooded | AGM |
| Supplied | — | Activated and charged |
| Weight | — | 3 kg |
The YB9-B column gives the specifications from Yuasa's product page, as Yuasa is the brand behind this battery code. The other column gives the specifications of the battery sold by Satkit. Capacity is always compared using the same hour rating, and starting current using the same standard.
What YB9-B means
- YB: Yuasa's YuMicron series of high-performance conventional flooded batteries.
- 9: in this case, it is close to the capacity: the YB9-B has a capacity of 9 Ah at the 10-hour rate.
- -B: the combination of terminal layout, vent outlet and casing shape. There is no general rule; check the drawing for each battery code.
Battery codes that are easy to mix up with the YB9-B
| Battery code | Dimensions | Polarity | Difference |
|---|---|---|---|
| YB9L-B | 137 × 77 × 141 mm | + right | Same casing, opposite polarity: it will not work even if it fits. |
| 12N9-4B-1 | 135 × 75 × 139 mm | + left | Almost the same casing and the same polarity, but lower starting current (85 A EN): it is not a replacement. |
| 12N9-3B | 135 × 75 × 139 mm | + right | Same casing, opposite polarity: it will not work even if it fits. |
Satkit battery for YB9-B
OUTDO YB9-BS: 12 V and 9 Ah, 120 A starting current, sealed AGM, factory-activated and factory-charged.
Before switching to a sealed battery
The original is a conventional flooded battery. An AGM or gel battery can replace it as a maintenance-free option if the motorcycle's regulator/rectifier charges between 14.0 and 14.8 V at 3000–4000 rpm. If it charges less, stick with a conventional flooded battery. A sealed battery has no vent tube, so leave the motorcycle's vent tube disconnected.
Motorcycles that use the YB9-B
10 versions by make and model
Gilera
- Runner 125 1997–2015
- Runner 50 from 1997
- Liberty 125 2004–2012
- Typhoon 50 2011–2017
Brixton
- Felsberg 125 from 2019
Daelim
- Daystar 125 from 2001
