The HMF Optimizer is a Fuel-Injection Controller that has been pre-programmed to work with your machine with the proper tuning specifications for your HMF exhaust. You must retune your machine when adding an aftermarket exhaust system so the correct fuel mixture is delivered to prevent costly engine repairs.
Note: Not tuning your machine will void the warranty of your HMF exhaust.
Honda Rancher 420 (2014-2015)
*Does not fit the 2014 models with Independent Rear Suspension (IRS)