MAXIMA SKU: 78-9940

Maxima Air Filter Cleaner Spray 15.5oz - Harley & Indian V-Twin

$13.99
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About Maxima

Maxima Racing Oils has blended lubricants in California since 1979 and supplies factory race teams across powersports. Its V-twin oils are formulated for the shared-sump and air-cooled realities of American engines.

Keep your V-twin breathing clean with Maxima Air Filter Cleaner. This specialized spray is formulated to safely and effectively remove heavy oils, greases, and dirt from both foam and fabric air filters found on Harley-Davidson and Indian Motorcycles.

Why riders pick this

  • Designed for foam and fabric V-twin air filters
  • Safely removes oils, greases, and dirt without damage
  • Non-caustic emulsion formula protects filter materials
  • Rinses clean with water, leaving no residue
  • Ensures optimal engine airflow and performance

Unlike harsh solvents, Maxima's non-caustic emulsion formula gets your filter spotless without damaging crucial seams or glued joints. It's an essential part of routine maintenance to ensure your engine receives optimal airflow, which is critical for performance and longevity.

Gentle Yet Powerful Cleaning

  • Formulated for foam and fabric air filters on V-twin motorcycles
  • Safely lifts away heavy oils, grease, and embedded dirt
  • Non-caustic emulsion protects filter materials and glued seams
  • Rinses completely clean with water, leaving no residue

Maintain Peak Engine Performance

A clean air filter is fundamental to your V-twin's performance. Regular cleaning with a product like Maxima Air Filter Cleaner ensures your engine isn't starved for air, helping maintain consistent power and efficiency. After cleaning, allow your filter to dry thoroughly before re-oiling and reinstalling for best results.

Specifications

  • Brand: Maxima
  • Manufacturer Part #: 79920
  • UPC: 851211004017
  • Size: 15.5 oz
  • Length: 2.6 in
  • Width: 2.55 in
  • Height: 9.45 in
  • Weight: 1.27 lbs

Common questions

Will this cleaner damage my air filter's seams or glue?

No, Maxima Air Filter Cleaner is specifically formulated to be safe on all filter materials, including glued seams and joints, preventing damage during cleaning.

How do I properly use this air filter cleaner?

Spray the foam or fabric filter evenly, allow it to penetrate the grime for a few minutes, then rinse thoroughly with water. Ensure the filter is completely dry before re-oiling and reinstalling.

Can this cleaner be used on paper air filters?

This cleaner is designed for foam and fabric air filters. For paper elements, consult your filter manufacturer's recommendations or use a cleaner specifically formulated for paper.

Ordering from Vtwinbikers

  • Brand new, sourced through authorized US distribution — never used, never grey-market.
  • Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
  • Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
BRANDMaxima
TYPEChemicals
SKU78-9940
WEIGHT1.27 lb
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
5
8 RATINGS
5★ 8
4★ 0
3★ 0
2★ 0
1★ 0
✓ VERIFIED
Nov 1, 2025

Works very well bought many times

— John O
✓ VERIFIED
Nov 1, 2025

Works very well bought many times

— John O
✓ VERIFIED
Jan 29, 2025

Works great

Works great, excellent product.

— Rob K
✓ VERIFIED
Jan 29, 2025

Works great

Works great, excellent product.

— Rob K
✓ VERIFIED
Aug 2, 2023

Magic in a can

This stuff is insane! I filled my sink with water and hand soap and started scrubbing my filter down from the grime of yesteryears, and then i sprayed it down with this stuff. I was shocked at the results. It works amazingly. Dont be scared to get your hands dirty.

— Robert H
✓ VERIFIED
Aug 2, 2023

Magic in a can

This stuff is insane! I filled my sink with water and hand soap and started scrubbing my filter down from the grime of yesteryears, and then i sprayed it down with this stuff. I was shocked at the results. It works amazingly. Dont be scared to get your hands dirty.

— Robert H