![]() ![]() ECU Tuning FundamentalsĪ basic understanding about how an ECU works is helpful background to have before going down the tuner path. Wider Power Band – An ECU tuner, unlike factory engineers, has the freedom to alter virtually all ECU parameters – fuel, ignition, throttle – to safely extract as much horsepower and torque from the engine as possible.īeyond solving these common problems, a tuned ECU will deliver better fuel economy, reduce engine operating temperatures, and remove factory imposed speed limiters and other settings to suite a rider’s individual preference.Changing any part of the system without remapping the ECU to compensate defeats the purpose and ironically can even degrade engine performance and longevity. Factory ECU programming is designed to deliver the right fuel and air mixture along with optimal ignition timing to match the factory air intake and exhaust set-up. Engines operate as a unit, to move air from intake to exhaust, creating power in the process. Same applies if changes were made to any part of the air intake system. Improved Airflow – If your bike has an aftermarket exhaust system, even a slip-on exhaust, then the ECU should be re-mapped.Throttle Lag – A feeling of hesitation between wrist movement and engine response that leads to sloppy gear changes, particularly when downshifting.Image © American Sport Touring.Ī tuned ECU can resolve common performance problems: A non-descript black box that processes signals from multiple sensors and control modules to manage engine performance. This FJR ECU is an example of the typical motorcycle ECU. Many of these compromises show up in the ECU. Consequently, factory engineers are compelled to make compromises here and there to create a bike with both respectable street manners and regulatory compliance. Instead, they are constrained by emission standards, fuel economy targets, and sales considerations like rideability and safety. Unfortunately, engineers don’t work in isolation. But there are more important reasons to “flash” an ECU.įirst, let’s acknowledge that factory engineers are quite capable of producing motorcycles with extraordinary power and performance if left on their own. The impulse to tune an ECU starts with a desire for more horsepower. Most ECU tuning is intended for track use and likely to leave your bike out of compliance with emissions regulations. Before going ahead with any modifications, carefully consider any impact on your motorcycle warranty and emissions compliance. ![]()
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