Yuasa YTX20L-BS Maintenance Free AGM 12-Volt Battery w/Bottle

Name: Yuasa YTX20L-BS Maintenance Free AGM 12-Volt Battery w/Bottle - Wyld Performance
SKU: ysaYUAM320BS
Price: 160.95 USD
Availability: InStock

SKU: ysaYUAM320BS

$160.95

In stock

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Category: Batteries

Yuasa YTX20L-BS Maintenance Free AGM Battery

SKU: ysaYUAM320BS
Part Number: YUAM320BS
Type: AGM
Voltage: 12V

Yuasa has been making OEM batteries for powersports manufacturers longer than most brands have existed. The YTX20L-BS is one of the most widely used motorcycle battery sizes in the world — and that's not by accident. It's the battery that fits right, cranks reliably, and sits quietly all winter without demanding attention.This version comes with the acid bottle included. Fill it, charge it once, seal it up, and you're done. No ongoing maintenance beyond keeping it on a trickle charger during long storage periods.

Key Benefit

AGM technology is what separates this from old-school flooded batteries. The electrolyte is absorbed into fiberglass mat separators — nothing sloshing around, nothing to spill, no water levels to check. Acid is absorbed in special plates and AGM separators, making the battery spill-proof whether it's mounted upright or at an angle.The lead-calcium alloy construction is where the long-term advantage shows up. Advanced lead-calcium technology holds specific gravity more than three times longer than conventional lead-antimony batteries — meaning much longer periods between charges when the battery is in standby mode, like winter storage.270 cold cranking amps handles starting duties on everything from large-displacement V-twins to big bore ATVs without hesitation. The maximum charge rate sits at 1.8A, so a standard battery tender or smart charger works fine for maintenance charging.

Full Specifications

Part Number: YUAM320BS
Type: AGM Maintenance Free
Voltage: 12V
Amp Hour Capacity (10-Hour Rate): 18 Ah
Cold Cranking Amperage: 270 CCA
Maximum Charge Rate: 1.8A
Positive Terminal Location: Right
Length: 6-7/8" (6.875")
Width: 3-7/16" (3.437")
Height: 6-1/8" (6.125")
Weight: 13.9 lbs
Acid Pack: Included
Manufactured: USA

Fitment Clarity

The YTX20L-BS covers an enormous range of powersports applications. Confirmed fitment includes Honda VTX1800 (2002–2011), Honda AquaTrax F-15 / F-15X (2003–2013), Kawasaki JT1500 STX / STX-15F (2004–2013), Kawasaki JH1100 ZXi (1996–2003), Harley-Davidson FXD Dyna series (1999–2006), and BRP Ski-Doo ZX types (2002–2003).Additional fitment spans Honda CBX (1979–1980), Kawasaki KZ1000 Police (1980–2005), Kawasaki ZG1000 Concours (1986–2006), Sea-Doo SP 580 (1988–1993), and many other large-displacement motorcycles, ATVs, UTVs, snowmobiles, and personal watercraft.Always confirm fitment against your owner's manual or Yuasa's application guide before ordering. Terminal location matters — the positive terminal is on the right side of this battery.

Install Insight

This battery ships dry and requires filling with the included acid bottle before first use. Fill slowly, let it soak for 30 minutes, then charge before installing. Don't skip the initial charge — it extends battery life significantly. Use a smart charger or battery tender set to AGM mode. Once filled and sealed, the battery does not need water added at any point.During off-season storage, keep it on a maintenance charger. Periodic charging is required when not in use — even an AGM will sulfate if left sitting completely discharged for months. A quality trickle charger costs far less than a replacement battery.

Who This Is For

Any rider whose machine takes a YTX20L-BS from the factory and wants a genuine Yuasa replacement — not a budget substitute. Yuasa is the OEM supplier for most major motorcycle and powersports manufacturers. Buying the Yuasa means you're getting the same battery the manufacturer put in the bike originally, at a fraction of the dealer markup.

Frequently Asked Questions

Does this battery come with acid or do I need to buy it separately?

The acid bottle is included with this kit. Fill, charge, seal — everything you need is in the box.

Do I need to charge it before first use?

Yes. Fill with the included acid pack, let it rest for 30 minutes, then charge at 1.8A before installing. Skipping the initial charge shortens battery life.

Is this battery spill-proof?

Yes. Once filled and sealed, the AGM construction absorbs the electrol yte into the separator mats. There's no free liquid inside, so it won't spill even if mounted at an angle.

Which side is the positive terminal on?

Positive terminal is on the right. Confirm this matches your battery tray orientation before ordering — if your application needs the positive on the left, look at the YTX20CH-BS variant instead.

How do I maintain it during winter storage?

Connect it to a smart charger or battery tender set to AGM mode. Check it monthly. A fully discharged AGM left sitting all winter will sulfate and won't recover — a $30 battery tender protects a $130+ battery.

How does this compare to a budget YTX20L-BS replacement?

Yuasa is the original equipment manufacturer for most major powersports brands. Budget batteries may list the same specs, but the internal construction, plate quality, and actual cold cranking performance often fall short of what's on the label. If your machine came with a Yuasa from the factory, a Yuasa replacement is the straightforward choice.

Can I use a standard battery charger on this?

Yes, at 1.8A maximum charge rate. A smart charger with an AGM mode is ideal. Avoid fast chargers that push above 2A — they can damage AGM batteries over time.

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