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5 Best Rated Motorcycle Batteries for S&S 124 in 2026
You want a lightweight, reliable 12V battery for your S&S 124, and you’ll like these five top picks: Weize Lithium YTX20L-BS (12V 8Ah LiFePO4) for weight savings and built-in BMS, ExpertPower ETX14-BS (12V 14Ah AGM) for dependable starts, YB14A-A2 sealed AGM for broad bike fit and durability, Mighty Max YTX4L-BS for small machines, and Mighty Max YB12A-A 12V 12Ah AGM for balance of capacity and price — read on to see fit, terminals, and charging tips.
| Weize Lithium YTX20L-BS 12V 8Ah Motorcycle Battery |
| Best High-Performance | Voltage: 12V | Battery Type / Chemistry: LiFePO4 (lithium iron phosphate) | Intended Applications: Motorcycle, ATV, UTV, jet ski, 4‑wheeler, snowmobile, PWC, generator, riding mower | VIEW LATEST PRICE | Read Our Analysis |
| ExpertPower ETX14-BS 12V 14Ah Sealed Battery |
| Best Value | Voltage: 12V | Battery Type / Chemistry: Sealed Lead‑Acid (AGM) | Intended Applications: Motorcycle/ATV replacement (YTX14‑BS form) | VIEW LATEST PRICE | Read Our Analysis |
| ATV/Scooter Sealed AGM Battery YB14A-A2 Compatible |
| Best Longevity | Voltage: 12V | Battery Type / Chemistry: Sealed Lead‑Acid (AGM) | Intended Applications: ATV, scooter, snowmobile, UTV, motorcycle (Yamaha/Honda/Suzuki/Kawasaki compatible) | VIEW LATEST PRICE | Read Our Analysis |
| Mighty Max YTX4L-BS SLA Battery for ATVs |
| Budget-Friendly Pick | Voltage: 12V | Battery Type / Chemistry: Sealed Lead‑Acid (AGM/SLA) | Intended Applications: ATV, quad, dirt/pit bike (50/70/110/125 cc) | VIEW LATEST PRICE | Read Our Analysis |
| Mighty Max YB12A-A 12V 12Ah AGM Motorcycle Battery |
| Reliable Midrange | Voltage: 12V | Battery Type / Chemistry: Sealed Lead‑Acid (AGM/SLA) | Intended Applications: Motorcycle and similar powersports applications | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Weize Lithium YTX20L-BS 12V 8Ah Motorcycle Battery
In case you want a lighter, longer-lasting battery that starts reliably on cold mornings, the Weize Lithium YTX20L-BS is a smart pick for S&S 124 users who value dependability and easy installation. You’ll appreciate its 12V LiFePO4 design and 8Ah capacity that delivers 600 CCA and 600A peak current for brisk starts. It weighs under six pounds and fits many bikes, ATVs, jet skis, and mowers, so check dimensions and terminal placement before swapping. Built-in BMS protects charge, discharge, and temperature, and the pack comes ready to install. You’ll like the longer cycle life and low maintenance.
- Voltage:12V
- Battery Type / Chemistry:LiFePO4 (lithium iron phosphate)
- Intended Applications:Motorcycle, ATV, UTV, jet ski, 4‑wheeler, snowmobile, PWC, generator, riding mower
- Capacity (Ah):8 Ah (primary spec; sometimes listed as 12 Ah)
- Cold Cranking / Starting Performance:600 CCA (peak 600A stated)
- Physical Dimensions / Form Factor:6.93″ L × 3.43″ W × 6.10″ H (Group 20 / YTX20L‑BS)
- Additional Feature:Built-in BMS protection
- Additional Feature:Lightweight LiFePO4 construction
- Additional Feature:50,000+ starts claimed
ExpertPower ETX14-BS 12V 14Ah Sealed Battery
You’ll find the ExpertPower ETX14-BS 12V 14Ah sealed battery is a solid choice whenever you need reliable starting power and low maintenance for an S&S 124 engine. You’ll like its 220 CCA rating for crisp starts, and the 12 volt, 14 Ah capacity gives steady reserve for lights and accessories. The sealed AGM design keeps it spill proof and maintenance free, so you won’t worry about topping up acid. It fits compact spaces at 5.90 when 3.42 when 5.70 inches. You get a 90 day refund window and a one year warranty for peace of mind.
- Voltage:12V
- Battery Type / Chemistry:Sealed Lead‑Acid (AGM)
- Intended Applications:Motorcycle/ATV replacement (YTX14‑BS form)
- Capacity (Ah):14 Ah
- Cold Cranking / Starting Performance:220 CCA
- Physical Dimensions / Form Factor:5.90″ L × 3.42″ W × 5.70″ H (YTX14‑BS form)
- Additional Feature:AGM sealed spill-proof
- Additional Feature:1-year warranty
- Additional Feature:YTX14-BS replacement
ATV/Scooter Sealed AGM Battery YB14A-A2 Compatible
In case you want a reliable, maintenance-free replacement for your ATV, scooter, or small motorcycle, the YB14A-A2 sealed AGM battery is a great choice for riders who hate fuss and need steady power. You get 12V, 12Ah, and 210 CCA in a compact 5.24 x 3.54 x 6.85 inch case that weighs 9.79 lbs. The polypropylene shell resists heat better than ABS, while a corrosion-resistant micro crystal structure and patented alloy reduce leaks and wear. It fits Yamaha, Honda, Suzuki, Kawasaki, and similar models. With over five years expected life, 15 month warranty, and US support that replies fast, you’ll feel confident on every ride.
- Voltage:12V
- Battery Type / Chemistry:Sealed Lead‑Acid (AGM)
- Intended Applications:ATV, scooter, snowmobile, UTV, motorcycle (Yamaha/Honda/Suzuki/Kawasaki compatible)
- Capacity (Ah):12 Ah
- Cold Cranking / Starting Performance:210 CCA
- Physical Dimensions / Form Factor:5.24″ L × 3.54″ W × 6.85″ H (YB14A‑A2 / YTX14AH‑BS)
- Additional Feature:Polypropylene heat-resistant case
- Additional Feature:15-month warranty
- Additional Feature:US local support
Mighty Max YTX4L-BS SLA Battery for ATVs
Should you ride small ATVs or dirt bikes and want a battery that’s tough, compact, and simple to care for, the Mighty Max YTX4L-BS fits the bill. You’ll like its 12V, 3 AH output and 50 CCA that could handle 50 to 125 cc machines without fuss. It’s sealed AGM so you won’t worry about spills, and you can mount it any way you need for tight frames. It resists shocks, handles hot and cold, and recovers from deep discharge. You get just the battery and screws, and a one year warranty, so plan mounting gear ahead.
- Voltage:12V
- Battery Type / Chemistry:Sealed Lead‑Acid (AGM/SLA)
- Intended Applications:ATV, quad, dirt/pit bike (50/70/110/125 cc)
- Capacity (Ah):3 Ah
- Cold Cranking / Starting Performance:50 CCA
- Physical Dimensions / Form Factor:4.40″ L × 2.90″ W × 3.42″ H (YTX4L‑BS)
- Additional Feature:Mountable any position
- Additional Feature:Shock and vibration resistant
- Additional Feature:Includes mounting screws
Mighty Max YB12A-A 12V 12Ah AGM Motorcycle Battery
In case you want a dependable, low-fuss battery for your S&S 124 that handles hard starts and rough rides, the Powerful Max YB12A-A is a smart pick. You’ll like its sealed AGM design because it’s spill proof and needs no watering. It gives 12 volts and 12 amp hours with 165 CCA, so it wakes your engine even in cold snaps. You can mount it any way, and it resists shocks and vibration on bumpy roads. It recharges, recovers from deep discharge, and lasts in wide temperatures. It ships with screws only and comes with a one year warranty.
- Voltage:12V
- Battery Type / Chemistry:Sealed Lead‑Acid (AGM/SLA)
- Intended Applications:Motorcycle and similar powersports applications
- Capacity (Ah):12 Ah
- Cold Cranking / Starting Performance:165 CCA
- Physical Dimensions / Form Factor:5.24″ L × 3.15″ W × 6.10″ H (YB12A‑A)
- Additional Feature:Deep-discharge recovery
- Additional Feature:Spill-proof AGM construction
- Additional Feature:Positive/negative polarity specified
Factors to Consider When Choosing Rated Motorcycle Batteries For S&s 124
At the time you pick a rated battery for your S&S 124, you’ll want to check fitment and dimensions initially so it sits securely in the tray. Then compare voltage, capacity, cold cranking power, chemistry type, and terminal orientation to make sure the battery will start reliably and match your bike’s electrical needs. I’ll guide you through each factor so you can choose a battery that fits, performs, and gives you confidence on the road.
Fitment And Dimensions
For a solid fit in your S&S 124, start through matching the battery group size and outer dimensions to the compartment so the unit sits snug and the cover closes properly. Next, check terminal type, location, and polarity so your cables reach without stretching or needing adapters. Also confirm terminal stud size and that cold start and peak current posts clear nearby frame, electronics, and heat to prevent shorts or damage. Pay attention to total weight and mounting orientation because heavier or oddly shaped batteries can shift balance or fail to fit the hold down and tray. Measure cable slack and connector type and allow insulating space around the battery for ventilation and heat dissipation to keep things safe and reliable.
Voltage And Capacity
You’ve already checked fit and terminals, so now consider voltage and capacity the same way you’d plan a road trip: know how far you need to go and what conditions you’ll face. Make sure the battery gives the S&S 124 its required nominal voltage, typically 12V, so your electronics and charging system stay safe. Match amp-hour capacity to how you ride. Choose 8 to 14 Ah in case you run lights, heated grips, or ride sporadically. Pick lower Ah to save weight whenever you prioritize performance. Also balance capacity with size and terminal layout so the battery fits without stress. Finally check your regulator and charger are set for the battery chemistry and charge voltages to keep capacity and life intact.
Cold Cranking Power
Consider cold cranking power as the muscle your battery needs to kick over the S&S 124 on a frosty morning. You want a battery with strong CCA because cold makes oil thicker and chemistry less efficient, so your starter needs more amps. Check the manufacturer recommended CCA and match or exceed it to avoid straining the starter or draining the battery. Also confirm the battery’s peak cranking current so voltage won’t sag on high compression starts. Keep in mind cold cuts available capacity sharply, so equivalent CCA requirements might differ across battery types. Whenever you choose, balance CCA with real world riding and storage habits. That way you’ll trust your bike to start, even on the coldest days.
Battery Chemistry Type
Cold mornings showed you why cold cranking power matters, and now you’ll want to pick the battery chemistry that matches how you ride, store, and maintain the S&S 124. You’ll choose between sealed lead acid and lithium options. SLA or AGM feels familiar. It is heavier, rugged, spill proof, and gives steady CCA for cold starts. It needs less charging care. Lithium, especially LiFePO4, saves weight and enhances handling. It lasts thousands of cycles, drains slowly, and resists heat better than other lithium types. But lithium needs proper charging and a built in management system to avoid over or under voltage issues. At very low temps, lithium usable capacity can fall, so factor winter storage and frequent rides into your choice.
Terminal Location Orientation
Lining up the battery posts before you bolt anything down will save you time and frustration while fitting a battery into the S&S 124. Check which side is positive and which is negative so your cable routing stays correct. Measure where the terminals sit relative to the battery size so posts meet tray clamps and connector lengths without strain. In tight compartments pick a battery with terminal placement that keeps posts clear of frame, heat, and wiring to prevent shorts or melting. Match stud thread size like M6, M8, or SAE to factory connectors or plan an adapter for a secure, low resistance connection. Also consider access for charging and jump starts; top or front terminals are easier to reach.
Weight And Size Impact
When you swap a battery for an S&S 124, size and weight matter more than you could envision because they change how the bike feels and fits. You need dimensions that match the tray and terminal locations, so cables route cleanly and installation is simple. Small differences in length, width, or height can stop you from fitting the pack. Weight changes handling. Lighter batteries enhance agility and cut unsprung mass. Heavier batteries can lower center of gravity but slow steering response. Also check terminal type and orientation so you don’t add adapters or rewiring that increase weight and complexity. Consider about mounting options and whether the battery can sit tilted. Finally, consider weight placement, since off‑center or high mounts harm cornering stability and feedback.
Charging And BMS Features
Because a battery’s charging rules and built-in protection affect every ride, you should pick a pack for your S&S 124 that has the right charging specs and a strong BMS you can trust. Look for a BMS that guards against overcharge, over-discharge, overcurrent, short circuit, and abnormal temperature so you don’t face sudden failures on the road. Check the battery’s recommended charging voltage and current so your charger or bike regulator matches the chemistry. Verify allowable charge temperature range for safe charging in your climate. Prefer units with recovery or automatic reactivation after a protective cutoff so brief faults don’t leave you stranded. Should you opt for lithium, use a charger with a LiFePO4 mode to avoid damage and false cutoffs.
Frequently Asked Questions
Can These Batteries Be Used in Other Motorcycle Models?
Yes, you can often use these batteries in other motorcycle models provided they match the required voltage, dimensions, terminal layout, and cold cranking amps; check your owner’s manual and verify compatibility before installing to avoid damage or poor performance.
Are Any of These Batteries Recyclable Locally?
Yes — many of those batteries are recyclable locally; you’ll check labels or contact retailers for lead‑acid or lithium recycling options, and you’ll drop them at automotive stores, recycling centers, or hazardous‑waste collection events.
Do Any Batteries Require Break-In Charging Before Installation?
Yes — you should check: some lead-acid and absorbed glass mat batteries benefit from a break-in or full charge before use, while most aftermarket lithium types usually ship ready; always follow the manufacturer’s charge and installation instructions.
Which Batteries Perform Best in Extreme Cold Climates?
Lithium and high-quality AGM batteries perform best in extreme cold; you’ll prefer Lithium for weight and cranking power, but AGM tolerates freezing better and won’t suffer as much capacity loss whenever temperatures plunge—keep them charged.
Are Warranty Transfers Available if I Sell the Bike?
Yes — some manufacturers allow warranty transfers if you sell the bike, but rules vary. Read the fine print before you buy; don’t count your chickens yet. Register the transfer promptly and keep original proof and receipts.
