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How does the Optimizer work?

It's an often misconception that a fuel injected engine will automatically tune itself when an after market part is added.  This is actually not the case.  When adding an after... read more

I changed the settings on my Optimizer and want to reset it back to the stock settings. Is there a reset function?

The Optimizer does not have a reset function but going back to the stock settings is quite easy.  Go to "help + installation" and in the blue bar enter the... read more

If I install the spark arrestor in my HMF exhaust will that decrease the power?

Not at all.  Our spark arrestor is designed to stop debris from exiting the exhaust system and causing harm to the environment.  Any restriction to flow is totally negligible and... read more

I was told by someone if I just install a slip-on exhaust I don’t need to tune my machine, but if I order a full exhaust system I will. Is this true?

While some companies will say that installing a slip on does not require tuning, at HMF this is rarely the case.  Most of the restriction in an exhaust system lies... read more

Your website says fuel tuning is necessary for my machine if I install your exhaust. Is that just a way of selling a fuel tuner or is it really necessary?

Not all machines do require tuning and we’ll tell you if it is needed or not.  With modern fuel injection systems they do not typically have the capability to compensate... read more

Will other fuel tuners work with your exhaust? I already installed “X” brand and now want to install an HMF exhaust.

A lot of this depends on a number of factors.  We perform all of our tuning and testing in-house to verify that air-fuel ratios are safe and will not cause... read more

Why has the fuel economy decreased on my machine after installing your exhaust?

Because the HMF exhaust systems increase the potential air flow through your engine that must be compensated for with more fuel.  In order to maintain a safe air-fuel ratio when... read more

I have HMF exhaust and an Optimizer installed and now I want to do other modifications. Can you tell me the settings I need to put into my Optimizer?

The exact settings for your particular machine and setup are impossible for us to determine.  However, we can make some suggestions and have a lot of good information and tips... read more

Why is my head pipe glowing?

Your head pipe is glowing because our head pipes along with many others (aftermarket or original) are made from thinner materials compared to those used in the past.  Its not... read more

How do I install my HMF Optimizer fuel controller?

The first step when installing the Optimizer is connect it to a good ground source.  This can be a good part of the chassis or the negative battery terminmal.  Failure... read more

Maverick XDS Turbo | Race Up Pipe Notice

UTV Exhaust systems for the Can Am Maverick XDS Turbo built before 5/25/15 may be seeing failures in the flanges on the Race Up Pipe.  This issue effects the following HMF... read more

Do I need to change or alter the settings on the HMF Fuel Optimizer/Programmer?

We get this question quite often at HMF, and generally the answer is no.  If you have a stock machine without any major modifications, other than installing an HMF exhaust... read more

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