Yamaha TRX850 Oil & Air Filter
GarageDex's powersports data shows the Yamaha TRX850 uses air filter HFA4801 and oil filter HF145.
Filter fitment by year
| Years | Air filter | Oil filter | Performance oil |
|---|---|---|---|
| 1995-2000 | HFA4801 | HF145 | - |
Match the exact part code. Performance oil filters are optional racing-spec upgrades that fit the same mount.
Filters for your Yamaha TRX850
The recommended parts are the HFA4801 air filter and the HF145 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 Yamaha TRX850 take?
GarageDex's powersports data shows the Yamaha TRX850 uses air filter HFA4801 and oil filter HF145.
What are the Yamaha TRX850 filter part numbers?
The Yamaha TRX850 uses air filter HFA4801 and oil filter HF145. 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.