A lean-running engine is like a starving tiger – offer it some fresh throttle meat and it’ll have your hand off.īut it’s not just lean-running that causes a snatchy throttle. Offer it some fresh throttle meat and it’ll lazily take it from you. I like to think of a rich (or normally fuelled) engine as a big, well-fed tiger. In a lean motor, those blurry transitions become sharp and angular – translating as an inconsistent, unpredictable or snatchy throttle. When an engine is running with a richer mixture, the transitions between fine degrees of throttle control are blurred and blended the edges are rounded off. But none of these are insurmountable and they’re cleaner than rich-running engines, where fuel is sloshed merrily around to prevent these, and other, issues arising.Īnother issue with a lean-running engine is managing fine throttle control. Lean-running engines have lots of potential problems – they run hot, engine wear is more likely, combustion is harder to manage, and mixture ratio is critical to avoid engine damage. The opposite – a rich-running engine – is using a lower ratio of air to fuel it’s got more petrol in the mixture. A lean-running engine is one using a relatively high ratio of air to fuel – it means more of the fuel is burned, and more completely, and less gets into the exhaust and the outside world. The next step in making a clean engine is to make it a lean engine. It’s a waste of money and perfectly good bhp.īut if emissions tests are conducted at low speeds and revs, at partial throttle openings – usually simulating town riding, where pollution is the biggest problem – then that’s where the manufacturers put their efforts to make their engines ‘clean’. If emissions tests aren’t at full throttle and top speed (which they aren’t), then there’s no point engineering an engine to be clean under those conditions. Without getting too side-tracked into the details of how engines work, the bottom line of making an engine’s exhaust gasses ‘clean’ enough to pass emissions tests is, firstly, make them clean only where the motor needs to be clean to pass the tests. Long story and several intertwined reasons, but the biggest culprit is emissions regulations. Why do motorcycles have a snatchy throttle in the first place? think you’ve said in the past how the ivan tune really improved throttle response from the ecu. i had hoped that maybe you might offer some input on their comments in the article about snatchy throttle. Watch as Shiv explains everything you need to know about flash tuning in action from the dynamometer.Well rcannon that’s too bad. Troy Siahaan of walks us through the process with Shiv Pathak of Open Flash Performance. We have decades of experience with the Dyno and tuning motorcycles tailored to your exact riding purposes and needs. In addtion, our techs have extensive certifications, including Ducati, Honda, Aprilia, MV Agusta, Suzuki, Yamaha, and Ohlins. V1 MOTO is an authorized Rexxer and Dyno dealership.Ī ll of our technicians, including our Certified Ducati and Honda Master Techs have been Rexxer and Dyno certified. The overall idea is changing your stock ECU's (Electronic Control Unit) parameters to safely build more power, deliver power smoother, and make it run as efficient as it can for your purposes. The problem is that your stock ECU has been de-tuned to the lowest common denominator, which is way less than optimal. The process is called ECU tuning, but it's also known as ECU flashing, remapping, and several other names.
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