Yuasa YUAM329BS YTX9-BS Maintenance Free AGM Battery with Acid pack

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.

I've had my street license for 50 years, owning dozens of bikes over the 700k mi I've ridden. I tend to keep bikes for years, with 3-5 in the garage at a time. I tried the the cheaper batteries and learned my lesson. The cheapies don't last as long, and they tend to fail immediately, leaving you stranded. Yuasa's last longer, and breakdown slower, such that you notice the battery is weaker but not dead, providing the opportunity to replace at home vs on the road.The reason - virgin vs recycled lead. Yuasa only uses virgin lead, the cheap ones use recycled, causing faster breakdown, and in many cases almost instant failure - pop and you're dead on the road. Get a Yuasa, keep it on a de-sulfating cycle charger. They will last years longer and not leave you stranded.

So this battery works the way batteries have worked for years. You get it, fill it with the acid it comes with it, seal it up, and then put it on a charger for about 4-6 hours. This is not a sign of crap - rather this is a sign of quality. If you want a battery that was fully charged at the factory and has now been sitting on a shelf for 6-12 months, go to walmart and buy that. This battery can sit on a shelf for 100 years with zero degradaion becuase the acid is not in the battery yet. Yuasa has come up with a super neat and safe/contained way to add all the acid. Then you charge it for a bit and you are good to go. If you just put the acid in and then try to ue it five minutes lated - no waiiting and no charge - you will be sad (like some of the reviews here)

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.

Had this battery in my bike for last 6 months and it fires up my bike each time I'm ready to ride.

I cant remember which bike I purchased this for. But I have not had any issues with any of my bikes. I keep them on a trickle charger when stored, and they start every time. Still holds a charge after years. It has preformed great. I am very happy with this purchase. I would buy again

So the screws are far too short for this battery. They provide you with nuts which are loose and sit at the bottom of the battery. You can see by the picture there is hardly any room between the screw and the battery. That means if you have ANYTHING else connected to the battery you're going to have problems with installation. I ended up putting a wad of electrical tape on the bottom of both screws in order to get them close enough to the top for the screw to reach it. A simple redesign that allows the screw to slide in at the top would be an easy fix, but hey, I'm not an engineer. I had to use a longer screw for the negative side since after 15 minutes for trying I could get the one they sent in. It probably took me around 40 minutes to get this done when it should have taken 5. DO NOT BUY IF YOU HAVE ANY ACCESSORIES GOING TO THE BATTERY. YOU WILL REGRET IT.10/26/20 updateBought this battery again like a chump and this time it died on me after being installed for under a month. I'm going to a local auto shop from here on out to get my batteries. This is just pure garbage.

Perfect for my Royal Enfield Meteor 350