Mash 50cc E5 Ecu Performance UpgradeECU Performance Software Upgrade for Mash 50cc Euro 5. After a view months of testing, "We did it" More Engine Power and Torque for the Mash 50cc Euro 5 With the standard gear ratio, the Mash 50cc runs approximately 70 km h in combination with this ECU Software Upgrade. Speedlimiter and RPM limiter are modified also for 70cc or 80cc No Fault codes or Engine Checklight on Dash All Lights working like original More Engine power and Torque in Higher RPM