Malossi O2 Controller (5519817B)

Lambda emulator for 125–300 cc fuel-injected four-stroke engines. Once the intake, variator or exhaust has been changed, the standard ECU keeps trimming the mixture back towards the factory map — this module corrects the oxygen sensor signal so the fuelling stays where the tune needs it. Plug-in fitment, nothing cut.

Part no. 5519817B · Brand: Malossi · Fitment confirmed by Scooter Narcotics before installation.