Malossi mixer Yamaha YI engines from year 21 (also E5+)

The Malossi mixture emulator (O2 controller) optimizes the control of the air-fuel ratio in modern 4-stroke 125/155 models. The device emulates the signal from the original lambda sensor with high accuracy and enables stable mixture tuning in a closed control loop. Especially in combination with the Malossi Force Master ECU, this results in fully controllable mixture control.

The current version offers improved signal emulation and a revised design. Three LEDs provide real-time information about the function: Power, Rich, and Lean. At start-up, the Power and Rich LEDs light up, later Rich and Lean alternate in the control loop.

Technical data

• Electronic mixture emulator (O2 controller)
• Exact emulation of the lambda sensor signal
• Optimized mixture control in closed control loop
• 3 LED indicators: Power, Rich, Lean
• Can be combined with Malossi Force Master ECU
• Revised electronics and housing technology
• Plug-and-play on OEM wiring harness

Compatible models (excerpt)

• Yamaha
• MT 125 (2021–2025)
• NMAX 125 (2021–2025)
• NMAX 155 (2023–2024)
• T-MAX 530 (2012–2018)
• T-MAX 560 (2020–2027)
• T-MAX DX 530 (2017–2018)
• T-MAX SX 530 (2017–2018)
• Tricity 150 (2022–2023)
• XMAX 125 (2021–2024)
• Tricity 125 (2023–2024)
• YZF R 125 (2021–2024)
• XSR 125 (2022–2023)
• R IE 4T LC 125 (2025–2026)
• Fantic Motor
• Caballero 125: Flat Track / Scrambler / Deluxe (2021–2022)
• XEF 125: Competition / Performance (2021–2025)
• XMF 125 Motard: Competition / Performance (2021–2025)
• Betamotor
• RR Enduro LC 4T 125 (2021–2025)
• RR Motard LC 4T 125 (2021–2025)
• Voge
• 125R (2023–2024)
• Vent
• Derapage IE 4T LC 125 (2022–2023)

Scope of delivery

• Malossi mixture simulator
• Plug-and-play cable set