Fuel Control Overview

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Fuel Tuning

The most efficient way to true performance.


'Wakes up' performance
Crisp and responsive throttle
Smooths out throttle transitions
HP and torque gains

How it Works

Power is dependent on how well the air / fuel mixture is ignited in the cylinder.
Air / fuel ratio (AFR) is controlled by the Engine Control Unit (ECU).
Bazzaz fuel controllers piggy back onto the ECU, intercepting the signals sent to the fuel injectors and modifying them.
The precise data for these changes is stored in the fuel controller in the form of a fuel map.

Who needs it?

Every vehicle can benefit from fuel tuning.
Stock vehicles may come with an air/fuel mixture that can be too lean or too rich in various areas, affecting performance.
Vehicles with any modifications (such as exhaust or high-flow filters) must have their fueling tuned to accommodate the change in air volume to the AFR.
Variables in fuel tuning include: fuel blend or type, engine wear, exhaust, filter, engine modifications, air temperature, air pressure, and humidity.


Our fuel controllers and self mapping module make advanced fuel tuning simple.

The Z-Fi fuel controller is what stores the fuel maps. Plug and play to get started. Tune to a higher level with easy to use software.

Learn More

The Z-AFM air / fuel mapper is technology that builds ultra-precise, custom fuel maps simply while riding.
Tuning for your bike, your conditions, has never been easier.

Learn More

To our customers and dealers,

The Bazzaz team would like to thank you for the many years of support and loyalty to our products.

As of 1/1/22 Bazzaz will no longer offer support for the Bazzaz engine management line (Z-Fi, Z-Fi TC, QS4, ZAFM).

Although YFI racing will not be offering technical support for Bazzaz products except for customers who purchased directly from YFI Racing, many QS4 kits, accessories, and spare parts will be available through them. www.yfi-racing.com.

You can also contact YFI Racing at sales@yfi-racing.com if you do not find what you are looking for on their site.

The Bazzaz website will remain to offer customers access to installation instructions, fuel map database, and technical support documents. The technical support documents utilize the same diagnosis steps that the Bazzaz technical support team has worked from since the beginning so they should be very helpful.

The Big Three: double-check these three common culprits:

  1. The Bazzaz ground lug is properly secured to a non-insulating chassis ground. Test this by temporarily grounding the Bazzaz ground lug directly to the battery negative terminal and checking to see if this resolves the issue.
  2. The vehicle has fuel and there are no obstructions (such as a fuel line kink) that could affect fuel delivery.
  3. The Bazzaz control unit powers up. Turn the key on and the control unit should illuminate blue. If it does not, re-check the 12V power source connection

Bazzaz tuning software and software manual

Principia dyno software and software manual

Fuel map database

Engine management wire color guide

Not starting or running properly

Quick shifter troubleshooting

Software troubleshooting

Traction control settings

Traction control troubleshooting

ZAFM troubleshooting

ZAFM O2 sensor installation

Z Bomb integration

Best regards,
Bazzaz team

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