---
product_id: 721274
title: "YUAM329BS YTX9-BS Maintenance Free AGM Battery with Acid pack"
brand: "yuasa"
price: "¥31305"
currency: JPY
in_stock: true
reviews_count: 8
category: "Yuasa"
url: https://www.desertcart.jp/products/721274-yuam329bs-ytx9-bs-maintenance-free-agm-battery-with-acid-pack
store_origin: JP
region: Japan
---

# 8Ah Capacity @10HR 135 CCA @ 0°F (-18°C) Maintenance-Free AGM Tech YUAM329BS YTX9-BS Maintenance Free AGM Battery with Acid pack

**Brand:** yuasa
**Price:** ¥31305
**Availability:** ✅ In Stock

## Summary

> ⚡ Power your ride with Yuasa’s maintenance-free AGM battery — reliability you can’t afford to miss!

## Quick Answers

- **What is this?** YUAM329BS YTX9-BS Maintenance Free AGM Battery with Acid pack by yuasa
- **How much does it cost?** ¥31305 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/721274-yuam329bs-ytx9-bs-maintenance-free-agm-battery-with-acid-pack)

## Best For

- yuasa enthusiasts

## Why This Product

- Trusted yuasa brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Yet Mighty:** Sleek 6x3.4x4.2 inch size with a lightweight 6.6 lbs design fits perfectly without bulk.
- • **Ready When You Are:** Ships dry with acid pack for fresh activation, ensuring peak performance and longer shelf life.
- • **Power that Lasts Longer:** Advanced lead-calcium tech holds charge 3x longer than conventional batteries, so you stay powered up when it counts.
- • **Spill-Proof & Safe Design:** AGM separators absorb electrolyte making the battery nonspillable and valve-regulated to prevent water loss.
- • **Zero Maintenance, Maximum Freedom:** No water refills or electrolyte top-ups needed—just install, activate, and go.

## Overview

The Yuasa YUAM329BS YTX9-BS is a 12V, 8Ah Absorbed Glass Mat (AGM) lead-acid battery designed for ATVs and powersports vehicles. Featuring advanced lead-calcium technology, it offers 3x longer specific gravity retention than traditional batteries, a nonspillable valve-regulated design, and ships dry with an acid pack for fresh activation. Compact and lightweight, it delivers 135 cold cranking amps at -18°C, ensuring dependable starts in cold conditions without the hassle of maintenance.

## Description

Yuasa AGM batteries are Maintenance Free, with no need to add water, but periodic charging required when not in use. Advanced lead-calcium technology – holds its specific gravity more than 3 times longer than conventional lead antimony batteries. Absorbed Glass Mat (AGM) separators absorb electrolyte making the battery nonspillable, the valve regulated design eliminates water loss and the need for refilling. Bottle Supplied (BS) – dry AGM batteries are shipped with the electrolyte stored in a plastic container and the battery is filled with electrolyte from the container by the end user when it’s ready to be activated. Size/Weight - Length: 6 in (150 mm), Width: 3 7/16 in (87 mm), Height: 4 3/16 in (105 mm), Weight with Acid (lbs.): 6.6; Specs - Capacity Ah: 8 @ 10HR, Regular Charge Current (Amp): 0.9, C.C.A. @ 0 °F (-18 °C): 135

Review: Real Yuasa?? - The reason I say Real Yuasa is because Ive ordered a Yuasa from another seller and what they shipped was not a Yuasa. They claim the brand they shipped is the same as Yuasa and that the companies merged which is not true according to my local Yuasa distributor rep at my local moto shop. This battery was easy to match to my bike and arrived in perfect condition. Finish, fit and operation is great. Be cautious when adding the liquid. Yes the battery comes "dry" and you have to add the battery liguid and install the cap. When installing the cap, I placed the battery on a solid surface, covered it with a rag and used a light duty hammer to gently tap the cap in place. Start tapping it in place from one end to another to insure a solid fit. The cap fits very snug so it is not possible in most cases to pop it in with your hands. Highly recommend this quality battery ***Update after 3 months*** Battery didnt last long. Wont hold a charge even when putting it on a regular or trickle charger. Questioning if its a real Yuasa now. Ive never had this problem with all of the other Yuasas Ive purchased from my local shops over the years. Waiting for a replacement battery from Powersport Superstore going on 2 weeks now. Will provide an update for the replacement battery when received. *** Update after 4 months*** I've continuously tried to work with Powersports Superstore and they are now giving me the run around. Still no replacement battery. The original battery was either just a bad apple or they're selling fakes which I've run into before. I have 3-6 year old Yuasa batteries that are still working without failure on my other bikes. My advise is to go to your local shop if possible and buy a Yuasa battery. They generally buy direct from Yuasa and that way you know you're getting the real thing. ***Update*** Im happy to report that I received a replacement battery via UPS on 12/11 from Powersports. I will install and hope that this one lasts. I previously called Yuasa on 12/11 to see if they could help and they were extremely helpful. Although they dont warranty batteries directly when sold retail, they were a big help and offered some kind of assistance after I had the battery tested by an authorized motorcycle dealer. Good company and good customer service from Yuasa. I will definitely continue to buy their products just not online. Besides, they informed me that although you can buy batteries online, you cannot return them once filled due to chemical hazard and shipping restrictions (understandable) Bottom Line: There are certain things that we should just not buy online. Support you local shops.
Review: No need to look elsewhere for a quality AGM battery - Perfect replacement for my KTM 390 Adventure. Yuasa has been the gold standard of motorcycle batteries for decades. Ships dry, so there's no question of how "old" the battery is, no worry about how much life it has left. Adding the acid is as foolproof as it gets, anyone who finds it problematic shouldn't be maintaining and operating powersport equipment in the first place. Tap the caps into place and charge, simple as that.

## Features

- Yuasa AGM batteries are Maintenance Free, with no need to add water, but periodic charging required when not in use
- Advanced lead-calcium technology – holds its specific gravity more than 3 times longer than conventional lead antimony batteries
- Absorbed Glass Mat (AGM) separators absorb electrolyte making the battery nonspillable, the valve regulated design eliminates water loss and the need for refilling
- Bottle Supplied (BS) – dry AGM batteries are shipped with the electrolyte stored in a plastic container and the battery is filled with electrolyte from the container by the end user when it’s ready to be activated
- Size/Weight - Length: 6 in (150 mm), Width: 3 7/16 in (87 mm), Height: 4 3/16 in (105 mm), Weight with Acid (lbs.): 6.6; Specs - Capacity Ah: 8 @ 10HR, Regular Charge Current (Amp): 0.9, C.C.A. @ 0 °F (-18 °C): 135

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000N5U5VG |
| Battery Cell Composition | Lead-Acid, AGM |
| Battery Type | Lead-Acid, AGM |
| Best Sellers Rank | #54,977 in Automotive ( See Top 100 in Automotive ) #131 in Powersports Batteries |
| Brand | Yuasa |
| Brand Name | Yuasa |
| Compatible with Vehicle Type | ATV |
| Customer Reviews | 4.5 out of 5 stars 980 Reviews |
| Global Trade Identification Number | 00048493329611 |
| Included Components | Yuasa YUAM329BS |
| Item Dimensions D x W x H | 3.44"D x 6"W x 4.19"H |
| Item Height | 6 inches |
| Item Type Name | lead_acid_battery |
| Item Weight | 4 Pounds |
| Manufacturer | Yuasa |
| Manufacturer Part Number | YUAM329BS |
| Manufacturer Warranty Description | Manufacturer Warranty |
| Size | YTX9-BS |
| Terminal | F1 Terminal |
| UPC | 048493329611 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | ATV |
| Voltage | 12 Volts |

## Product Details

- **Brand:** Yuasa
- **Vehicle Service Type:** ATV
- **Size:** YTX9-BS
- **Voltage:** 12 Volts
- **Battery Cell Composition:** Lead-Acid, AGM
- **Item Weight:** 4 Pounds
- **Product Dimensions:** 3.44"D x 6"W x 4.19"H
- **Terminal:** F1 Terminal
- **OEM Part Number:** YUAM329BS
- **Manufacturer:** Yuasa

## Images

![YUAM329BS YTX9-BS Maintenance Free AGM Battery with Acid pack - Image 1](https://m.media-amazon.com/images/I/81Xjq28x6ZL.jpg)

## Questions & Answers

**Q: Can someone who has ordered and received this item, please tell me the dimensions?**
A: Please don't pay attention to the dimensions Amazon has listed. They're almost always wrong. Always refer to Yuasa's website, which in this case show that this battery is  6" x 3.4375" x 4.1875". Hope that helps.

**Q: Does this battery come with a warranty**
A: They carry a 1 year warranty for manufacturers defects in workmanship and materials.

**Q: will this fit in my 2014 kawasaki ninja 300?**
A: Yes it should...it fit 2013 ninja 300

**Q: will it fit my 2001 Honda rancher trx350fe atv?**
A: No your Rancher takes a YTX14-BS. Thanks!

## Customer Reviews

### ⭐⭐⭐⭐⭐ Real Yuasa??
*by C***B on August 8, 2012*

The reason I say Real Yuasa is because Ive ordered a Yuasa from another seller and what they shipped was not a Yuasa. They claim the brand they shipped is the same as Yuasa and that the companies merged which is not true according to my local Yuasa distributor rep at my local moto shop. This battery was easy to match to my bike and arrived in perfect condition. Finish, fit and operation is great. Be cautious when adding the liquid. Yes the battery comes "dry" and you have to add the battery liguid and install the cap. When installing the cap, I placed the battery on a solid surface, covered it with a rag and used a light duty hammer to gently tap the cap in place. Start tapping it in place from one end to another to insure a solid fit. The cap fits very snug so it is not possible in most cases to pop it in with your hands. Highly recommend this quality battery ***Update after 3 months*** Battery didnt last long. Wont hold a charge even when putting it on a regular or trickle charger. Questioning if its a real Yuasa now. Ive never had this problem with all of the other Yuasas Ive purchased from my local shops over the years. Waiting for a replacement battery from Powersport Superstore going on 2 weeks now. Will provide an update for the replacement battery when received. *** Update after 4 months*** I've continuously tried to work with Powersports Superstore and they are now giving me the run around. Still no replacement battery. The original battery was either just a bad apple or they're selling fakes which I've run into before. I have 3-6 year old Yuasa batteries that are still working without failure on my other bikes. My advise is to go to your local shop if possible and buy a Yuasa battery. They generally buy direct from Yuasa and that way you know you're getting the real thing. ***Update*** Im happy to report that I received a replacement battery via UPS on 12/11 from Powersports. I will install and hope that this one lasts. I previously called Yuasa on 12/11 to see if they could help and they were extremely helpful. Although they dont warranty batteries directly when sold retail, they were a big help and offered some kind of assistance after I had the battery tested by an authorized motorcycle dealer. Good company and good customer service from Yuasa. I will definitely continue to buy their products just not online. Besides, they informed me that although you can buy batteries online, you cannot return them once filled due to chemical hazard and shipping restrictions (understandable) Bottom Line: There are certain things that we should just not buy online. Support you local shops.

### ⭐⭐⭐⭐⭐ No need to look elsewhere for a quality AGM battery
*by B***. on October 11, 2025*

Perfect replacement for my KTM 390 Adventure. Yuasa has been the gold standard of motorcycle batteries for decades. Ships dry, so there's no question of how "old" the battery is, no worry about how much life it has left. Adding the acid is as foolproof as it gets, anyone who finds it problematic shouldn't be maintaining and operating powersport equipment in the first place. Tap the caps into place and charge, simple as that.

### ⭐⭐⭐⭐⭐ Great long lasting battery
*by G***A on April 5, 2025*

Great battery. I had this exact same model in my bike from factory for 6yrs (2019-2025). I use a battery tender to keep it charged when not in use for long periods. My gps would drain the battery otherwise.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-10*