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FJR Motorcycle Forums
Technical & Mechanical Problems
how does the OE fueling run?
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<blockquote data-quote="UselessPickles" data-source="post: 949246" data-attributes="member: 3256"><p>If my bike was stock, I could have answered the question exactly with the data logger on my Motty AFR tuner, but my bike isn't stock. The best I can do is add to Fred's post by saying that 13.2:1 is the common AFR target for 100% throttle when dyno tuning a bike. The stock fueling must be richer than that since the PCIII map for a stock bike removes fuel at 100% throttle.</p><p></p><p>One theory for running excessively rich is so that you don't run too lean at full throttle after installing aftermarket slip-ons. It's like Yamaha knows that many people will customize their exhaust without being aware that they should probably get the fueling system re-tuned <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="UselessPickles, post: 949246, member: 3256"] If my bike was stock, I could have answered the question exactly with the data logger on my Motty AFR tuner, but my bike isn't stock. The best I can do is add to Fred's post by saying that 13.2:1 is the common AFR target for 100% throttle when dyno tuning a bike. The stock fueling must be richer than that since the PCIII map for a stock bike removes fuel at 100% throttle. One theory for running excessively rich is so that you don't run too lean at full throttle after installing aftermarket slip-ons. It's like Yamaha knows that many people will customize their exhaust without being aware that they should probably get the fueling system re-tuned :) [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
how does the OE fueling run?
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