Rolling Wrench Wideband O2 Sensor

The Details ⚙️

Carb tuning without AFR data is guesswork. This Rolling Wrench Wideband O2 Sensor Kit gives you real-time air-fuel ratio readings so you can tune accurately the first time.

We spent over a year testing sensors and components to build a kit that delivers fast, accurate, and reliable AFR data for GY6 builds, scooters, and small engines.

The included Bosch wideband O2 sensor reads your exhaust gases and sends precise AFR values to the gauge — eliminating plug reading, guesswork, and endless rejetting.

Simply install the sensor (weld-in bung included if needed), wire the system, and start tuning with real data.

Tune faster, run safer, and get the most out of your setup 🔧🔥

What's Included 📦

• 📊 Rolling Wrench AFR Gauge
• 🧩 Gauge cup + sun visor
• 🔧 Gauge cup mount + hardware
• 🪟 Flat surface dash mount
• 🧠 Power bank control module
• 🧪 Bosch wideband O2 sensor
• 🔩 Weld-in O2 bung + cap
• 🔌 O2 sensor wiring harness
• 🔋 Power harness
• 🔗 Gauge-to-module harness
• 💾 Data logging cable
• 📖 Instruction booklet

Important Things to Note 🚨

Recommended AFR targets:

• Idle: 13.3–14.7 AFR (12–12.5 with performance cam)
• Cruise: 13–13.3 AFR
• Full Throttle: 12–12.5 AFR

• Welding the included bung into your exhaust is required unless your system already has a port.
• Supports data logging for advanced tuning.
• Works with carbureted and performance engine setups.

Not sure how to interpret your readings? Message us — we’ll help you dial it in 👍

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