The Memjet EVO ECU is designed to improve throttle response and smoothness on electronically fuel-injected motorcycles, optimizing the fuel mixture without the need for remapping or invasive modifications to the original electronics.

Modern motorcycles, in order to comply with emission regulations, often run very lean fuel maps that can result in low-end hesitation, uneven response, and a pronounced on/off effect.

Memjet EVO acts on the air temperature sensor signal (IAT), allowing the original ECU to automatically adjust injection parameters. This results in a fuller, smoother, and more responsive throttle while keeping all factory management and safety logic fully active.

The module features a 0–10 adjustment range. At setting 0, the bike remains in standard configuration; progressively increasing the value enriches the fuel delivery until the ideal setup is found based on the level of modification (exhaust, air filter, etc.). Adjustment is immediate and requires no software, remapping, or dyno.

Installation is simple and fully reversible; the product is plug and play and supplied with wiring specific to the selected motorcycle model.

Intended exclusively for sport use on closed circuits.

Bike Fitment:

• Yamaha Majesty 400 2004
• Yamaha Majesty 400 2005
• Yamaha Majesty 400 2006
• Yamaha Majesty 400 2007
• Yamaha Majesty 400 2008
• Yamaha Majesty 400 2009
• Yamaha Majesty 400 2010
• Yamaha Majesty 400 2011
• Yamaha Majesty 400 2012
• Yamaha Majesty 400 2013
• Yamaha Majesty 400 2014
• Yamaha Majesty 400 2015
• Yamaha Majesty 400 2016