The Honda Rebel 500 uses a 12-volt sealed lead-acid battery, typically an AGM-style unit such as the Yuasa YTX9-BS or an equivalent. This compact, maintenance-free battery fits under the Rebel’s seat and powers the CMX500’s electrical system.
Battery type and specifications
Understanding the core specification helps you pick a replacement that fits and performs reliably. The Rebel 500’s electrical system runs on a standard 12-volt battery, with most OEM and aftermarket options falling in the 8–9 Ah range and utilizing an AGM (absorbed glass mat) construction for maintenance-free operation.
OEM specification
For most model years, Honda and common aftermarket references point to a 12-volt AGM battery in the 8.6 Ah class, with the Yuasa YTX9-BS being the most commonly cited option that matches the Rebel 500’s size and terminals. Always verify the exact fit with your year and VIN via the owner's manual or a parts fiche if you’re unsure.
Common replacement options
To help you shop, here are typical replacement avenues. The list that follows is a quick guide to compatible choices, not an exhaustive catalog.
- Yuasa YTX9-BS — 12V, about 8.6 Ah, AGM; widely used as an OEM-style replacement.
- Other reputable 12V AGM motorcycle batteries of similar size and capacity — brands such as Motobatt, Exide, or Interstate that specify compatibility with mid-size motorcycles.
- OEM-equivalent or high-quality AGM batteries offered by motorcycle specialty brands, provided they match the same dimensions and terminal layout.
In practice, you want a 12-volt AGM battery with roughly 8–9 Ah capacity and the same terminal arrangement used by the Rebel 500. If in doubt, bring the old battery or its measurements to the retailer to confirm fit.
Installation notes
Replacing the Rebel 500 battery is a straightforward DIY task if you follow proper steps to avoid damage or injury. The following steps cover the typical process, but consult your manual for any model-year nuances.
- Park on a level surface, switch off the bike, and remove the seat to access the battery compartment.
- Disconnect the negative (-) terminal first, then the positive (+) terminal to prevent short circuits.
- Remove the battery hold-down strap or bracket and slide the old battery out of the tray.
- Clean the tray and terminals; inspect for corrosion or damage to terminals and wiring.
- Install the new battery in the same orientation as the old one, reconnect the terminals (positive first or negative first as appropriate for your bike’s configuration), and secure the hold-down.
- Reconnect the battery to the starter circuit and test the electrical system with the ignition off, then start the bike to confirm proper operation.
With the proper fit and secure installation, the Rebel 500’s electrical system should power up reliably and support starting, lights, and electronic features as designed.
Maintenance and care
To extend the life of your Rebel 500 battery, follow these care tips. Regular charging, clean terminals, and proper storage practices help prevent early failures and cold-weather no-starts.
- Keep the battery clean and terminals tight; remove any corrosion with a baking soda solution if needed.
- Use a motorcycle-specific smart charger/maintainer if the bike sits unused for extended periods.
- Avoid exposing the battery to excessive heat or direct sunlight, which can shorten life.
- Check the electrolyte level only if you’re using a conventional flooded battery; for AGM, this step is not required, and you should replace rather than open them.
Routine checks and proper charging habits help ensure reliable starting and electrical performance across seasons.
Summary
In short, the Honda Rebel 500 runs on a 12-volt AGM battery, with the Yuasa YTX9-BS (or equivalent) being the most common OEM-style option. Replacement decisions should aim for a battery in the 8–9 Ah range with the correct terminal layout and dimensions to fit under the seat. Proper installation and ongoing maintenance will keep the bike starting reliably and the electrical system functioning as intended.