AT-121B PV AutoTune Kit (with Bungs) for Harley-Davidson MT22 ECU
Auto Tune Kit for Self Mapping.
AT-121B
This plug-and-play solution delivers precise Air/Fuel Ratio (AFR) data, seamlessly integrating with your Power Vision to optimize your engine’s performance.
By activating Autotune Pro mode on your Original Power Vision, Power Vision 3, or Power Vision 4 app, you empower the system to automatically adjust your vehicle’s VE tables, ensuring peak performance in every riding condition.
Key Features
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Engineered for Harley-Davidson MT22 ECU: Specifically designed to work with late-model Harley-Davidson motorcycles equipped with the MT22 ECU and Power Vision tuner.
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Dual Wideband O2 Sensors: Includes two Bosch wideband O2 sensors for precise, real-time monitoring and adjustment of both front and rear cylinders.
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Complete Kit with Weld-In Bungs: Comes with all necessary installation hardware, including two O2 sensor bungs for easy fitment on your exhaust.
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Real-Time Auto-Tuning: The Autotune module transmits accurate air/fuel (AFR) data to your Power Vision, letting you ride and tune at the same time for optimal performance at every RPM and throttle position.
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Easy Installation: Includes accessory power adapter, CAN cable, mounting velcro, zip ties, and step-by-step instructions for a straightforward install.
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Reliable & Accurate: Bosch wideband sensors offer far greater accuracy than OEM narrowband sensors for more effective, safe tuning.
What’s Included
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1 Autotune Module
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2 Bosch Wideband O2 Sensors
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1 52" O2 Sensor Cable
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1 24" O2 Sensor Cable
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2 O2 Sensor Bungs (M18 x 1.5)
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1 CAN Cable
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1 Accessory Power Adapter Cable
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2 Velcro Mounts
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3 Zip Ties
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Installation Guide
How It Works
The AutoTune Kit connects to your Harley-Davidson’s MT22 ECU via the Dynojet Power Vision. Dual wideband O2 sensors constantly monitor your bike’s exhaust gases, sending real-time AFR data to your tuner. The Power Vision then automatically adjusts your fuel mapping for ideal performance—no manual mapping required.
Installation Tips
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Weld bungs into exhaust pipes between the 9 and 3 o’clock positions, with at least a 10° incline for moisture protection.
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Mount the Autotune module securely, preferably on top of the ECU.
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Route cables away from heat and moving parts for long-term reliability.
Why Choose the AutoTune Kit?
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Hands-free, real-time tuning for Harley-Davidson MT22 ECU models.
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Comprehensive kit includes everything needed for installation—just add your Power Vision.
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Backed by Dynojet for reliability, accuracy, and proven performance gains.