TWIN AIR Air Filter for HONDA CRF 250, CRF 450 2025-2027

On HONDA CRF 250, CRF 450 from 2025 to 2027, the TWIN AIR 150233DR air filter fits in place of the original part. Off-road, the engine breathes air full of dust. The oil-soaked foam filter traps the particles; worn or badly fitted, it lets through dirt that wears out pistons and cylinders.

Specifications

• Brand: TWIN AIR
• Manufacturer part number: 150233DR
• EAN code: 8720239742053
• Engine: 4-stroke

When to replace it?

• Foam hardened, torn or coming away from its frame.
• Traces of dust behind the filter, in the intake boot.
• Filter that no longer gets its shape back after cleaning.

Clean and oil the filter after every dusty ride, and at least at the intervals given in the manual; replace it as soon as the foam hardens, tears or comes away from the frame. With two filters, you always have a clean one ready to go.

Fitting tips

1. Wash the filter with air filter cleaner, rinse it and let it dry completely.
2. Soak it in air filter oil, then squeeze out the excess without wringing the foam.
3. Lightly grease the sealing rim for a perfect seal.
4. Fit the filter flat on its cage, with no creases, and check that it seals all the way round.

Why TWIN AIR?

Twin Air, a Dutch brand founded in 1972, makes foam air filters and intake accessories for off-road riding. According to the brand, its filters are chosen as original equipment by more than 30 manufacturers.

Spare parts and items to plan

• Air filter oil : LIQUI MOLY 500 ml · LIQUI MOLY 1 L
• Air filter cleaner : MOTUL A1 5 L · MUC OFF 5 L
• Airbox wash cover : TECNIUM · TWIN AIR

Frequently asked questions

Does it need oiling before it's fitted for the first time?
Yes, unless it's sold pre-oiled: a dry foam filter lets dust through.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
HONDA CRF 250 2027
HONDA CRF 250 2026
HONDA CRF 250 2025
HONDA CRF 450 2026
HONDA CRF 450 2025