Honda TRX400 EX Oil & Air Filter
GarageDex's powersports data shows the Honda TRX400 EX uses air filter HFF1023 and oil filter HF113.
Filter fitment by year
| Years | Air filter | Oil filter | Performance oil |
|---|---|---|---|
| 1999-2000 | HFF1023 | HF113 | - |
Match the exact part code. Performance oil filters are optional racing-spec upgrades that fit the same mount.
Filters for your Honda TRX400 EX
The recommended parts are the HFF1023 air filter and the HF113 oil filter. Match those codes (or a listed equivalent) - powersports filters are model-specific, so the part code matters more than the brand.
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Frequently asked
What oil and air filter does a Honda TRX400 EX take?
GarageDex's powersports data shows the Honda TRX400 EX uses air filter HFF1023 and oil filter HF113.
What are the Honda TRX400 EX filter part numbers?
The Honda TRX400 EX uses air filter HFF1023 and oil filter HF113. Match the exact part code - powersports filters are model-specific.
How often should I change a powersports oil and air filter?
Change the oil filter at every oil service - typically every 3,000-4,000 miles or once a season. Clean or replace the air filter more often if you ride dusty trails; a clogged filter chokes power and fuel economy.