The stock battery for a 1998 Honda Foreman is a 12-volt sealed lead-acid unit, typically around 9 amp-hours (often referred to by the common replacement size YTX9-BS).
In this article, we break down what that means, how to verify the right size for your bike, and what to consider when replacing it.
Stock battery specifications
Here are the standard specs and common cross-reference for the original equipment and typical replacements.
- Voltage: 12V
- Capacity: approximately 9 Ah
- Type: sealed lead-acid, maintenance-free
- Common replacement size: YTX9-BS (12V, 9Ah)
- OEM references: check your owner's manual or Honda's parts catalog for the exact part number in your region; retailers often list compatible cross-references
When in doubt, confirm against your model's documentation or a trusted parts retailer to avoid mismatches.
Choosing the right battery for your Foreman
Use these steps to ensure you buy the correct replacement for your 1998 Foreman.
- Identify your exact model variant (e.g., Foreman 450S vs 450ES) and year to confirm the stock battery spec
- Measure the battery compartment dimensions and compare them with the replacement's size
- Ensure the replacement is a 12-volt sealed lead-acid type and matches the 9 Ah capacity or the retailer's specification
- Check terminal layout and connector compatibility with your wiring harness
- Consider climate and startup demand; many riders prefer around 170–180 CCA for reliable winter starts
- Consider upgrades carefully (AGM or lithium) and verify charging-system compatibility
With the right checks, you’ll avoid fitment issues and ensure reliable starts.
Model variants in the 1998 Foreman lineup
Foreman 450S
In the 1998 Foreman family, the 450S variant used the same 12V, approximately 9Ah battery as the other trims; the key requirement is maintaining a sealed lead-acid 12V battery with compatible terminals.
Foreman 450ES
The electronic-start version (450ES) likewise relies on a 12V sealed lead-acid battery around 9Ah; compatibility largely follows the same replacement options as the other Foreman models from the era.
Summary
For a 1998 Honda Foreman, expect a 12-volt sealed lead-acid battery around 9 Ah, commonly labeled YTX9-BS. Use the model year and variant to confirm the exact spec, and verify dimensions and terminal layout when replacing. If in doubt, consult the owner's manual or a trusted parts retailer to ensure you choose a correct fit.