Hey guys! So, you're looking to replace the battery on your 1999 Harley Ultra Classic? Awesome! You've come to the right place. Choosing the right battery is super important for keeping your ride running smoothly and reliably. A good battery means easy starts, consistent power for all your accessories, and peace of mind on those long road trips. Let's dive into everything you need to know to make the best choice for your bike.

Understanding Your 1999 Harley Ultra Classic Battery Needs

When it comes to choosing a battery for your 1999 Harley Ultra Classic, it's not just about picking the first one you see. You need to understand the specific requirements of your bike to ensure optimal performance and longevity. Let's break down the key factors.

First off, voltage is crucial. Your Harley requires a 12-volt battery. Using anything else can seriously damage your electrical system. Always double-check the voltage before you even think about installing a new battery.

Next, consider the Cold Cranking Amps (CCA). CCA measures the battery's ability to start your bike in cold weather. For a 1999 Ultra Classic, you'll want a battery with a CCA rating that meets or exceeds the original specification. A higher CCA rating can provide more reliable starts, especially if you ride in colder climates. Nobody wants to be stuck with a dead battery on a chilly morning!

Battery size and type also matter. Your bike was designed to accommodate a specific battery size, so make sure the new battery fits properly in the battery compartment. Using a battery that's too large or too small can lead to installation issues and potential damage. As for the type, you have a few options: conventional lead-acid, absorbed glass mat (AGM), and lithium-ion. AGM batteries are a popular choice because they are maintenance-free, spill-proof, and offer good performance. Lithium-ion batteries are lighter and more powerful but can be more expensive.

Lastly, reserve capacity (RC) is something to think about. RC indicates how long the battery can provide power if the charging system fails. A higher RC means you'll have more time to get your bike to safety if your alternator quits on you. This can be a lifesaver on long rides.

By understanding these factors, you can narrow down your options and choose a battery that perfectly fits your 1999 Harley Ultra Classic's needs. Trust me, doing your homework here will save you headaches down the road. Now, let's look at some specific battery options.

Top Battery Options for Your 1999 Harley Ultra Classic

Alright, let's get into some specific battery options that are known to work well with the 1999 Harley Ultra Classic. I've picked these based on reliability, performance, and value, so you can be sure you're getting a good deal.

1. Yuasa YTX20HL-BS

The Yuasa YTX20HL-BS is a classic choice for Harley-Davidson motorcycles, and for good reason. It's an AGM battery, which means it's maintenance-free and spill-proof. You won't have to worry about adding water or dealing with acid leaks. This battery offers excellent starting power and is known for its long lifespan. It typically has a CCA rating around 310, which is more than enough for your Ultra Classic. Plus, Yuasa is a trusted brand that's been around for ages, so you know you're getting a quality product.

2. WestCo 12V20P

The WestCo 12V20P is another great AGM option. It's specifically designed for Harley-Davidson motorcycles and provides reliable performance. This battery is known for its robust construction and ability to withstand vibrations, which is super important for a bike like the Ultra Classic. It also has a good CCA rating, usually around 270-300, ensuring reliable starts in various weather conditions. WestCo batteries are also competitively priced, making them a great value choice.

3. ThrottleX Batteries

ThrottleX Batteries offer high-performance AGM batteries designed to meet or exceed OEM specifications. Known for reliability and durability, ThrottleX batteries are a solid choice for Harley-Davidson enthusiasts looking for dependable power.

4. Lithium-Ion Options (Considerations)

While AGM batteries are the most common choice, lithium-ion batteries are becoming increasingly popular. They are much lighter than AGM batteries and offer higher starting power. However, they are also more expensive. If you're looking to save weight and get the best possible performance, a lithium-ion battery might be worth considering. Just make sure to do your research and choose a reputable brand. Brands like Shorai and AntiGravity Batteries are well-regarded in the lithium-ion motorcycle battery market.

Before you make a decision, always check the specific CCA rating and dimensions of the battery to ensure it's a perfect fit for your 1999 Harley Ultra Classic. Reading reviews from other riders can also provide valuable insights into the real-world performance of these batteries. Now, let's talk about how to install your new battery.

Step-by-Step Guide to Replacing Your 1999 Harley Ultra Classic Battery

Okay, so you've got your new battery. Awesome! Now it's time to get it installed. Don't worry, it's a pretty straightforward process. Just follow these steps, and you'll be back on the road in no time.

1. Gather Your Tools

Before you start, make sure you have everything you need. You'll typically need a socket set, a wrench, a screwdriver, and some protective gloves. It's also a good idea to have a battery terminal cleaner and some dielectric grease on hand.

2. Disconnect the Old Battery

First, locate the battery on your 1999 Harley Ultra Classic. It's usually under the seat or in a side compartment. Once you've found it, disconnect the negative (-) terminal first. This is super important to prevent any accidental short circuits. Then, disconnect the positive (+) terminal. Make sure the cables are out of the way so they don't accidentally touch the battery terminals.

3. Remove the Old Battery

Carefully remove the old battery from the battery compartment. Be mindful of its weight, as motorcycle batteries can be quite heavy. Inspect the battery compartment for any corrosion or debris and clean it if necessary.

4. Clean the Battery Terminals

Use a battery terminal cleaner to clean the battery terminals on your bike's cables. This will ensure a good connection with the new battery. If the terminals are heavily corroded, you might need to use a wire brush to remove the buildup.

5. Install the New Battery

Place the new battery into the battery compartment. Make sure it's oriented correctly. Now, connect the positive (+) terminal first, followed by the negative (-) terminal. Tighten the connections securely, but don't overtighten them, as this can damage the terminals.

6. Apply Dielectric Grease

Apply a small amount of dielectric grease to the battery terminals. This will help prevent corrosion and ensure a good connection in the future.

7. Secure the Battery

Make sure the battery is properly secured in the battery compartment. This will prevent it from moving around while you're riding.

8. Test the Battery

Before you put everything back together, test the battery to make sure it's working properly. Turn on the ignition and check if the bike starts. If it starts without any issues, you're good to go!

9. Reassemble Everything

Put the battery compartment cover back on and secure it. Reinstall the seat or any other components you removed to access the battery.

And that's it! You've successfully replaced the battery on your 1999 Harley Ultra Classic. Now you can enjoy your ride with confidence. Let's move on to some maintenance tips to keep your battery in top shape.

Battery Maintenance Tips for Longevity

So, you've got your new battery installed. Great! But the job doesn't end there. Proper maintenance is key to ensuring your 1999 Harley Ultra Classic battery lasts as long as possible. Here are some tips to keep your battery in top shape:

1. Regular Cleaning

Keep the battery terminals clean and free of corrosion. Use a battery terminal cleaner and a wire brush to remove any buildup. This will ensure a good connection and prevent issues down the road.

2. Check the Voltage

Periodically check the battery voltage with a multimeter. A fully charged 12-volt battery should read around 12.6 volts. If the voltage is significantly lower, it could indicate a problem with the battery or the charging system.

3. Proper Storage

If you're not going to be riding your bike for an extended period, it's important to store the battery properly. Disconnect the battery from the bike and store it in a cool, dry place. You might also want to use a battery tender to keep the battery charged while it's in storage.

4. Avoid Deep Discharges

Avoid letting the battery completely discharge. Deep discharges can damage the battery and shorten its lifespan. If you notice the battery is getting weak, charge it as soon as possible.

5. Check the Charging System

Make sure your bike's charging system is working properly. A faulty charging system can overcharge or undercharge the battery, both of which can damage it. Have the charging system checked by a qualified mechanic if you suspect there's a problem.

6. Use a Battery Tender

A battery tender is a smart investment for any motorcycle owner. It will keep your battery fully charged and prevent it from discharging during periods of inactivity. This can significantly extend the life of your battery.

By following these maintenance tips, you can keep your 1999 Harley Ultra Classic battery in top condition and enjoy years of reliable performance. Now, let's wrap things up with a quick summary.

Final Thoughts

Choosing the right battery for your 1999 Harley Ultra Classic is crucial for a smooth and reliable ride. By understanding your bike's specific needs, researching different battery options, and following proper installation and maintenance procedures, you can ensure your battery lasts as long as possible.

Remember to consider factors like voltage, CCA, battery type, and reserve capacity when choosing a new battery. Popular options include the Yuasa YTX20HL-BS and the WestCo 12V20P, but there are many other great choices out there. And don't forget to maintain your battery properly to keep it in top shape.

With the right battery and a little bit of care, you can enjoy many years of trouble-free riding on your 1999 Harley Ultra Classic. Safe travels, and happy riding!