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COVID-19 Update

As of the close of business Monday March 23rd, 2020, HMF Racing will be temporarily closing manufacturing and operations until May 1st as mandated by the State of Ohio to help slow the spread of the COVID-19 virus. We hope to resume normal work May 2nd, 2020. This is to protect the health and safety of all HMF staff and their families.

All orders that are currently in progress will be put on hold until operations resume. In Stock items are available to ship with negligible delays. New orders may still be placed on our website. Orders placed online will be charged and invoiced the next morning in order to reserve a place in the production queue. Delays in production in addition to the listed production time are possible depending on the volume of orders placed during this closure period.

From the HMF family to you:
Stay safe, stay healthy, and we look forward to helping you with your exhaust and equipment needs in the very near future.

Performance Series | Black w/ Black Euro

  • Performance Series | Black w/ Black Euro
  • Performance Series | Black w/ Black Euro
  • Performance Series | Black w/ Black Euro
  • Titan XL Series | Stainless Steel
  • Titan XL Series | Stainless Steel
  • Titan XL Series | Stainless Steel
  • Performance Series | Brushed Full System
  • Performance Series | Brushed Full System
  • Performance Series | Brushed | Full System
  • Titan XL Series | Stainless Steel
  • Performance Series | Brushed | Slip On
  • Performance Series | Brushed | Full System

Yamaha® Grizzly 700

The Yamaha® Grizzly 700 exhaust systems are available in the HMF™ PerformanceTitan, and Swamp (with snorkel) Series as a Slip-On or Full System.  The Performance Series picked up 5 horsepower and 4lb of torque.  The Titan/Swamp Series (Quiet or Loud) picked up 4 horsepower and 3lb of torque.  At idle, the stock muffler is at 85dB, while the Performance Series is at 98dB, the Titan/Swamp (Quiet) is at 86dB, and the Titan/Swamp (Loud) is at 93dB.  Tuning is 100% necessary when using exhaust.  The engine has air injection that must be blocked off to get valid AFR readings.

Slip-On Exhaust Fits:
(07-20) Grizzly 700, YFM7FG, SE, HZ, YFZ700
(08-14) Grizzly 550, YFM5FG, YFM550
(16-20) Kodiak 700

Full System Exhaust Fits:
(14-20) Grizzly 700, YFM7FG, SE, HZ, YFZ700
(16-20) Kodiak 700

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® Grizzly 700 ATV Accessories

Tuning

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.

Mode 1 Mode 2 Mode 3 Mode 4 Mode 5 Mode 6
            
3.5 3.5 2.5 4.0 5.0 6.5

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.

Optimizer Help

Click here to watch our HMF Optimizer tuning and installation video.

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