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Yamaha YFZ 450 | Full Exhaust System

  • Yamaha YFZ 450 | Full Exhaust System
  • Yamaha YFZ 450 | Slip-On Exhaust System | Performance Series
  • Yamaha YFZ 450 | Full Exhaust System | Competition Series
  • Yamaha YFZ 450 | Head Pipe
  • Yamaha YFZ 450 | Slip-On Exhaust System | Performance Series
  • Yamaha YFZ 450 | Full Exhaust System | Competition Series
  • Yamaha YFZ 450 | Full Exhaust System | Competition Series
  • Yamaha YFZ 450 | S-Bend
  • Yamaha YFZ 450 | Full Exhaust System | Performance Series
  • Yamaha YFZ 450 | Full Exhaust System | Competition Series
  • Yamaha YFZ 450 | Full Exhaust System | Performance Series
  • Yamaha YFZ 450 | Full Exhaust System | Competition Series

Yamaha® YFZ 450

The Yamaha® YFZ 450 is available as a Slip-On or Full System in the Performance and Competition exhausts.  The Competition Full Exhaust picked up roughly 6 more horse power and 4lbs of torque.  The Performance Series is available in manufacturers colors, and Competition exhaust includes 3 removable inserts to adjust power and sound levels according to your riding area.  

Fits:
(04-13) YFZ 450, SET, W, SPX

Fuel tuning is required learn more

Fuel Tuning is absolutely required when installing an HMF Exhaust on this machine. Failure to tune the engine can cause excessive damage to the exhaust system and engine, while voiding the warranty on your exhaust and possibly on your machine. (check with local dealer). See the tuning settings below for the proper fuel tuning solution on your machine.

Exhaust Systems

Yamaha® YFZ 450 ATV Accessories

Tuning

Slip on & Full: No Air Box Lid
165 Mikuni Large Main Jet. Move the washer to the bottom of the needle.

Slip on & Full: Air Box Lid On
Stock Main Jet. Move the washer to the bottom of the needle. 

HMF Basic Jet Kit Includes
160, 165, 170 Mikuni Large Round

Low Speed Fuel

Going down on the number scale will reduce low speed fuel. Going up on the number scale will increase low speed fuel.

Mid Range Fuel

Going down on the number scale will reduce mid range fuel. Going up on the number scale will increase mid range fuel.

High End Fuel

Going down on the number scale will reduce high end fuel. Going up on the number scale will increase high end fuel.

Green Lower Switch Point

Going down on the number scale will turn green mode on earlier. Going up on the number scale will turn green mode on later. These modes typically will not need adjusted from their base setting.

Yellow Lower Switch Point

Going down on the number scale will turn yellow mode on earlier. Going up on the number scale will turn yellow mode on later. These modes typically will not need adjusted from their base setting.

Red Lower Switch Point

Going down on the number scale will turn red mode on earlier. Going up on the number scale will turn red mode on later. These modes typically will not need adjusted from their base setting.

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