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FJR Motorcycle Forums
Technical & Mechanical Problems
Final Drive Swap: 6th gear solution?
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<blockquote data-quote="Fred W" data-source="post: 1145514" data-attributes="member: 3828"><p>Yes, that is true, but...</p><p></p><p>At an identical speed the vehicles will have the same wind resistance, so that is not a factor for or against changing gearing. The bike with higher gearing will get better fuel mileage (as long as the rpm is not so low as to drop off the torque curve) because the engine will be turning slower, swallowing fewer gulps of air and fuel per mile, and doing that with lower pumping losses (intake, exhausting and compression of the fuel air mixture all consume power that comes from the fuel).</p></blockquote><p></p>
[QUOTE="Fred W, post: 1145514, member: 3828"] Yes, that is true, but... At an identical speed the vehicles will have the same wind resistance, so that is not a factor for or against changing gearing. The bike with higher gearing will get better fuel mileage (as long as the rpm is not so low as to drop off the torque curve) because the engine will be turning slower, swallowing fewer gulps of air and fuel per mile, and doing that with lower pumping losses (intake, exhausting and compression of the fuel air mixture all consume power that comes from the fuel). [/QUOTE]
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FJR Motorcycle Forums
Technical & Mechanical Problems
Final Drive Swap: 6th gear solution?
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