PROX Air Filter for YAMAHA YFB 250, YFM 350 1987-2000

On YAMAHA YFB 250, YFM 350 from 1987 to 2000, the PROX 52.23092 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: PROX
• Manufacturer part number: 52.23092

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 PROX?

ProX Racing Parts has been supplying engine and clutch parts to motocross riders since 1975, from its headquarters near Amsterdam. According to its catalogue, most of its parts are made in Japan, by manufacturers that also produce parts for the Japanese motorcycle makers.

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 : see the selection

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:
YAMAHA YFB 250 2000
YAMAHA YFB 250 1999
YAMAHA YFB 250 1998
YAMAHA YFB 250 1997
YAMAHA YFB 250 1996
YAMAHA YFB 250 1995
YAMAHA YFB 250 1994
YAMAHA YFB 250 1993
YAMAHA YFB 250 1992
YAMAHA YFM 350 1999
YAMAHA YFM 350 1998
YAMAHA YFM 350 1997
YAMAHA YFM 350 1996
YAMAHA YFM 350 1995
YAMAHA YFM 350 1994
YAMAHA YFM 350 1993
YAMAHA YFM 350 1992
YAMAHA YFM 350 1991
YAMAHA YFM 350 1990
YAMAHA YFM 350 1989
YAMAHA YFM 350 1988
YAMAHA YFM 350 1987