ECU Tuners

Factory ECU programming isn’t exactly done with performance in mind. It’s designed to meet emissions regulations, achieve decent fuel economy, and keep your machine running on bad gas at extreme altitudes. All that conservatism leaves power and performance on the table that proper tuning can unlock. Side by Side Source carries a complete selection of ECU tuning solutions that optimize your engine's performance, from plug-and-play fuel controllers that adjust air/fuel ratios on the fly to complete reflash systems that rewrite your factory programming with custom maps designed specifically for your modifications.

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Buyer's Guide for UTV ECU Tuners: Helping You Shop!

Understanding the Different Types of UTV Fuel Controllers

ECU reflash systems are generally the most comprehensive option. They totally rewrite your factory ECU programming, allowing you to have complete control over fuel, timing, throttle response, and other functions normally governed by factory programming. Simply put, if you’re looking for the most control and the greatest results, reflash is what you want.

Piggyback systems pick up and modify signals sent by the ECU, which still allows you to adjust fuel delivery, timing, and other parameters. The trade-off here is that you don’t have to make such a drastic change to your ECU, but you don’t have quite the same level of control as reflash.

Finally, fuel controllers focus specifically on fuel delivery. There are plenty of plug-and-play options around that can lean out your air/fuel mixture. Whether you’re going for basic tuning, working around an intake upgrade or whatever else, these can be very handy.

When You Actually Need ECU Tuning

Whether you absolutely need tuning, could benefit from tuning, or don’t need it at all depends largely on your mods and setup. if you have any of the following done, for example, you definitely need tuning:

Turbo or supercharger kit
Big-bore kits or engine builds
High-flow fuel injectors
E85 fuel conversion

UTV ECU tuning is not mandatory, but is still highly recommended after:

Full exhaust system
High-flow air intake system
Camshaft upgrade

Finally, tuning is less important, but still potentially helpful after installing a slip-on exhaust muffler, air filter upgrade, or clutch kit.

Dyno vs Pre-Programmed UTV Tuning: What’s the Difference?

Dyno tuning is when someone custom-tunes your specific machine, while pre-programmed maps are ready-to-go setups that come with popular modifications you just have to load in to your system.

As you might have already guessed, custom dyno tuning is going to give you the best possible results, since everything is adjusted to your specific machine’s output, setup, altitude, and other factors.

Pre-programmed maps can still be highly effective, while costing far less than custom dyno tuning. Depending on the manufacturer, there are several “tiers” or “stages” available, each of which is programmed to provide popular mod combinations and to match popular setups.

3 Top Selling UTV ECU Tuner Brands

Trinity Racing is known for their top-quality reflash maps backed by extensive testing.
Weller Racing specializes in power-forward ECU tuning for top performance.
Big Gun Exhaust offers straightforward fuel controllers that pair perfectly with their exhaust systems for simple plug-and-play tuning solutions.

5 Top Selling UTV ECU Tuner Products

Unlock your Kawasaki Teryx KRX1000's potential with this PowerVision Reflash by Trinity Racing, featuring maps specifically developed for common KRX modifications and dyno-proven power gains.
Get comprehensive fuel injection control with this Striker Kit by Trail Tech, which lets you adjust fuel delivery across the entire RPM range for precise tuning.
Simple and effective, this Yamaha Viking 700 TFI Power Box by Big Gun Exhaust plugs right in and optimizes fuel delivery for better throttle response and power.
Can-Am Maverick X3 owners with serious builds need this Evolution Powersports ECU Programming by Geiser Performance, engineered specifically for turbocharged and heavily modified machines making big power.
Transform your Yamaha YXZ1000R's performance with this WR Edition ECU Reflash by Weller Racing, which smooths out the powerband and adds usable power across the entire RPM range.

UTV ECU Tuner Frequently Asked Questions

Will ECU tuning void my warranty?

Almost certainly yes for powertrain components, though this varies by manufacturer and dealer.

What if I want to go back to the original programming?

Nowadays, reflash tools will give you the capability to save your original setup before re-programming, allowing you to return to this setup whenever you want.

Will I have to use premium fuel after UTV ECU tuning?

It depends on the tune and your modifications. Check with your manufacturer/product, as some are designed to work with pump premium and some will need E85.