Cleaning & Oiling Dirt Bike Air Filters

Cleaning & Oiling Dirt Bike Air Filters

Tech Tip: Air Filters

Sounds silly to have a tech tip on air filters since we’ve all done sooo many in our lifetime, but you would be surprised by the amount of blown motors and tight valves I’ve seen from poor air filter maintenance. Peep the Do’s and Dont’s below - I guarantee you there's something your either not doing or are doing!


  • DO use pour-on filter oil - my favorite is Maxima FFT

  • DO compress the filter to spread the oil throughout the entire filter - visually inspect to confirm 100% of interior and exterior are coated with oil

  • DO squeeze out all excess oil - squeeze as hard as you can to remove excess or your bike may run like sh!t

  • DO run your fingers 100% around the rim of the filter after re-installation to ensure it is seated correctly against the air box - quick easy check that could save you tons in costly repairs

  • DO use gas to remove oil when cleaning filters, and then Dawn dish soap to remove everything left behind - it's a little nasty but works way better than anything else I’ve tried


  • DON’T grease the rim of your filters - this is unnecessary, reduces filter life, and messy

  • DON’T use spray foam filter oil - spray oils tend to be thinner to allow them to spray - also usually more expensive

  • DON’T leave excess oil in air filter - this will make your bike run like sh!t

  • DON’T apply oil to only outside of filter without squeezing the filter and spreading the oil throughout - spread it around!

  • DON’T run filters with seams that are tearing apart or foam that is falling off

  • DON’T let your air filter get totally caked with dust before cleaning - this bad practice makes your bike run like shit, and it also increases your chances of pulling dirt into your motor

One last little nugget here: If you know you’re going to be riding very dusty conditions or just honest with yourself on your poor filter maintenance, try running a FunnelWeb Air Filter (pictured above in this blog).

It's time to check your service intervals.


We prefer to monitor service intervals via hour meters for two reasons:

  1. Hour meters are a more accurate representation of the wear-and-tear on a bike than mileage.

  2. Hour meters are more common, easy, and cheaper to install than odometers.

Don’t have an hour meter? Bring your bike in, and we’ll dial ya in with one. Even better… if you spend $200 or more on your next job with us, we’ll install one for free - just request it!


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