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Intake Kits > Performance Intake Kit

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63-1123
 
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The K&N 63-1123 AirCharger air intake system replaces the restrictive factory air filter and air intake housing in some Yamaha YFZ450 models. K&N intakes are designed to dramatically reduce intake restriction as they smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine’s RPM range. The 63-1123 air intake comes with a black rubber topped K&N high-flow air filter and a heat shield that installs into the previous air box space. Air is directed through an aerodynamically engineered intake tube into the engine’s throttle body for a guaranteed power gain. The heat shield accommodates a replacement silicone crank case vent hose and supplied CCV filter. The oversized cone shaped air filter comes with a water repellent DryCharger filter wrap to protect the filter from moisture. This air intake is relatively easy to install usually in 90 minutes or less using existing factory mounting points. The tools needed are a screwdriver, ratchet set and some wrenches. This air intake cannot be sold in California. It is not legal for use in California or other states adopting California emission standards.

More Info on K&N Air Intakes for Sport ATVs
  • Guaranteed to increase horsepower
  • Designed to improve throttle response and engine sound
  • Free-flowing high density polyethylene tube
  • Easy to install, usually in 90 minutes or less
  • Replaces entire factory air intake system
  • Not legal for highway use in states adopting California emission regulations
  • Washable and reusable air filter
Available Information
Installation Instruction Sheet
63-1123 Vehicle Applications
Dyno Chart - 2008 Yamaha YFZ450 4.2hp
Video Installation Video - 63-1123
Video Features Video - 63-1123
News Story - Add Power to 2004-2009 Yamaha YFZ450 ATV with K&N Air Intake Kit


Part 63-1123 Product Specifications
Product Style: 63 Series Aircharger Kits
Estimated Horsepower Gain: 4.2 HP @ 7200 RPM
Replacement Filter: RU-4960XD
Air Filter Color: Red
Air Filter Outlet Shape: Round
Street Legal In All US States: No
Air Filter Height: 5.5 in (140 mm)
TUV Approved (Europe): No
Air Filter Material: Cotton Gauze
Clamps Included: 3
Clamp Material: Stainless Steel
Clamp Style: Regular
Couplers Included: 1
Mass Air Flow Sensor Adapter Included: Mass Air Flow Sensor Adapter Included When Required
Intake Pipe Color / Finish: Black
Intake Pipe Ports: All intake tube ports needed for the specified applications are included
Vacuum Tubing Included: Yes
Air Filter Large End Diameter: 6 in (152 mm)
California Restricted: Not legal for sale or use in California
Weight: 6.2 lb (2.8 kg)
Product Box Length: 18.25 in (464 mm)
Product Box Width: 14.5 in (368 mm)
Product Box Height: 8.5 in (216 mm)


Horsepower gains based on similar vehicle dynamometer test. Results will vary.


Customer Feedback      Be the first to review part 63-1123

The KN-204 was the perfect fit for my new Yamaha 2015 FZ-07 750cc. I really like the convenience and high-quality metal of the bolt-head, and the excellent seal of the filter. Thank you so much for anticipating the market!
Anne Lane, Stone Mountain, Georgia
I used the K&N RC-2540 filter as an air filter for my Yamaha Towny scooter. It fits perfect and the chrome end dressed up the bike.
Jay Kreminski, Illinois
I have a fz6r Yamaha and my bike drives so much better because of the new filter. A must buy if you have this bike.
Brandon Smith, Las Vegas, Nevada