The 2005 Suzuki Boulevard uses a standard 12-volt lead-acid motorcycle battery. The exact size depends on the specific Boulevard variant from that year, but all are 12V systems and replacements typically fall into common motorcycle battery sizes such as YTX9-BS or YTX12-BS.
Battery type and voltage
Most 2005 Boulevard models employ a sealed, maintenance-free 12-volt lead-acid battery. These are usually built as standard motorcycle batteries with positive and negative terminals arranged for easy connection to the bike’s wiring harness. The battery provides the essential cranking power needed to start the V-twin engine and run the electrical systems when the engine is off.
Below are common battery sizes that fit many 2005 Boulevard variants.
- YTX9-BS (12V, typically around 8–9Ah)
- YTX12-BS (12V, typically around 12–14Ah)
Note: The exact battery model and capacity can vary by model and production batch. Always check the label on your existing battery, the owner's manual, or the Suzuki service bulletin for your specific Boulevard variant to confirm the correct replacement.
How to confirm and replace
To verify the exact battery for your 2005 Boulevard, remove the seat or access panel and read the battery label, or compare the battery tray dimensions to those of the replacement battery. If in doubt, contact a Suzuki dealer or a trusted motorcycle mechanic with your VIN and bike model/year.
Replacement tips
- Choose a 12V sealed lead-acid battery (maintenance-free), preferably with appropriate cold-cranking amps (CCA) for a V-twin engine.
- Ensure the replacement’s dimensions fit the battery tray and that the terminals align with the bike’s wiring harness.
- Dispose of the old battery responsibly at a recycling facility.
Summary: The 2005 Suzuki Boulevard uses a 12-volt sealed lead-acid motorcycle battery. Replacement models commonly include YTX9-BS and YTX12-BS, but always verify with the specific model’s manual or labeling. Regular checks and proper disposal are recommended.
Summary
In short: A 12V sealed lead-acid battery is standard for the 2005 Suzuki Boulevard. Exact replacement size may vary by variant, with YTX9-BS and YTX12-BS as common options; always confirm via the battery label or the owner's manual.


