AGM Motorcycle Battery 12V: Mighty Max YTZ14S
The Mighty Max YTZ14S is a 12V, 11.2Ah sealed AGM battery rated at 230 cold-cranking amps. It arrives charged and sealed, with no acid to add before fitting, and it is built for compatible motorcycles and other powersports equipment.
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Will This Battery Fit Your Bike?
Mighty Max sells the YTZ14S for many motorcycle models, but a matching name on a listing is not proof of fit. Run this quick check against your owner’s manual and the old battery before you order.
YTZ14S is not the same as YTX14-BS, which has a taller case. Mighty Max also sells separate gel and lithium YTZ14S versions with different specifications, and this page covers the standard AGM version only. Retail fitment lists can contain errors, which is why your owner’s manual should have the final say.
Mighty Max YTZ14S Specifications
| Property | Detail |
|---|---|
| Brand / model | Mighty Max Battery YTZ14S |
| Battery type | Sealed lead-acid (SLA), AGM, rechargeable |
| Nominal voltage | 12 V |
| Rated capacity | 11.2 Ah (discharge rate not stated by Mighty Max) |
| Cold-cranking amps | 230 CCA (manufacturer rating) |
| Dimensions (L × W × H) | 6.00 × 3.44 × 4.38 in |
| Weight | 8.60 lb |
| Terminals | Nut-and-bolt |
| Polarity | Positive left, negative right (check the markings on the battery) |
| Supplied condition | Charged and sealed, no acid filling needed |
| Maintenance | Maintenance-free, no water top-ups |
| Standard listing contents | Battery and terminal screws, with no wiring harness or mounting hardware |
| Warranty | 1-year limited warranty from purchase date, original purchaser only |
| Charging profile, lifespan, terminal torque | Not published in the Mighty Max information reviewed |
Figures are the manufacturer’s published ratings, not independent test results. Capacity and starting performance vary with temperature, charge level and battery condition.
YTZ14S Battery Replacement Difficulty
This is an easy-to-moderate job when the battery sits under a simple seat or cover and the new battery fits the tray. The hardest part is usually reaching the battery, not changing it. Tap a slice to highlight it.
- 35% Reaching the battery (seat, covers, bodywork)
- 25% Checking fit (size, terminals, clamp)
- 25% Handling terminal hardware
- 15% Reconnecting & testing
Difficulty score and effort split are an editorial estimate, not an official Mighty Max rating. Hidden batteries, corroded cables or a poor fit raise the difficulty. If you are unsure about polarity or access, ask a qualified mechanic.
How to Replace Your Motorcycle Battery
Access differs by model, so follow your owner’s manual for seat and cover removal. Tap each step to tick it off as you go.
- 1Prepare and reach the batterySwitch the ignition off, let the machine cool, then remove the seat or covers your manual lists. Photograph the cable layout first.
- 2Disconnect the cablesRemove the negative (−) cable first, then the positive (+) cable. Never let a tool touch both terminals.
- 3Remove the old batteryRelease the strap or bracket and lift the battery out. Take care not to drop the terminal nuts.
- 4Inspect the tray and cablesClean light corrosion from the cable ends and check the tray, restraint and cables for damage.
- 5Fit the new YTZ14SSeat the battery with the terminals in the original layout and secure it. Connect the positive (+) cable first, then the negative (−) cable.
- 6Refit covers and testCheck both cables are tight and clear of bodywork, refit the covers and seat, then start the engine outdoors.
Recheck both terminal connections and the polarity. Confirm the battery has a full charge, since storage can drain it. If the bike still struggles, have the charging system and any electrical drain checked.
Equipment That Uses a YTZ14S
Mighty Max lists the YTZ14S for motorcycles, ATVs, personal watercraft and snowmobiles. Always confirm the battery type in your own manual first.
- Honda CB1100Listed for 2010–2014
- Honda ST1300Listed for 2003–2014
- Honda VFR1200FListed for 2010
- Honda NC S 750Listed for 2014–2015
- Yamaha FZ1 / FZS1000Listed for 2006–2014
- Yamaha BoltListed for 2014–2015
- ATVsCheck your model’s manual
- Personal watercraftCheck your model’s manual
- SnowmobilesCheck your model’s manual
- Honda EU7000isHonda specifies 12V 11.2Ah; owners report use
Model and year ranges come from Mighty Max application listings and have not been physically fit-tested. Generator use is owner-reported. Check your generator’s manual and battery space.
Safety, Charging & Disposal
Honda motorcycle manuals warn that an automobile-type charger can overheat a motorcycle battery and cause permanent damage. They also warn that the battery gives off explosive hydrogen gas during normal operation. Charge with a suitable charger in an open, ventilated space, away from sparks and flames.
- Use a charger that supports 12V AGM batteries and follow its instructions.
- Never open the case or add water or acid.
- Charge away from sparks, flames and smoking.
- Take the old battery to a battery retailer, dealer or hazardous-waste collection point.
Mighty Max YTZ14S: FAQ
Is the Mighty Max YTZ14S an AGM battery?
Yes. The standard YTZ14S is a sealed lead-acid battery with absorbed glass mat (AGM) construction. Mighty Max also sells separate gel and lithium YTZ14S versions with different specifications.
Does it need acid or activation before use?
No. Mighty Max supplies it charged and sealed. Do not open the case or add water or acid.
What does 230 CCA mean?
CCA stands for cold-cranking amps, a rating of starting ability in cold conditions. 230 CCA is the figure Mighty Max advertises. Real starting performance also depends on temperature, charge level and battery condition.
What charger should I use?
Use a charger that supports 12V AGM batteries and follow its instructions. The Mighty Max information reviewed does not publish a model-specific charging current or voltage profile.
Is the YTZ14S the same as the YTX14-BS?
No. They are different battery sizes. Mighty Max lists the YTX14-BS with a 5.75-inch height, compared with 4.38 inches for the YTZ14S.
Does the 14 in YTZ14S mean 14Ah?
No. Mighty Max rates this battery at 11.2Ah.
Can it be used in a generator?
Some owners report using it in generators. Honda specifies a 12V 11.2Ah battery for the EU7000is, but check your generator manual and the battery space before fitting.
What does the warranty cover?
Mighty Max advertises a one-year limited warranty that starts on the date of purchase and covers the original purchaser against faulty workmanship or materials.
How should I dispose of the old battery?
Do not put it in household rubbish or recycling bins. Take it to a battery retailer, dealer or household hazardous-waste collection point.