Originally Posted By: 02SE
Just because a bike has 6 gears instead of 5, does not necessarily mean the bike with 6 gears has a taller drive ratio in 6th, than a bike with 5 gears.
In your FJR1300 example, they changed the gear ratios basically for every 'Gear', while also adding the 6th gear. The new bikes' 6th gear ratio, IS however taller than the 5th gear ratio in the older 5-speed transmission equipped FJR's.
A lower engine speed does not always equate to better fuel efficiency. They are many variables in engine design, that determine a given engine BSFC.
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Ummm ... I think its generally acknowledged, again, general, that any vehicle of the same make and model that gets an overdrive gear added, does better with fuel economy, never mind the benefit of a silky smooth, non stressed engine feel reported on the 2016FJR at higher speeds, MEASURED BY GPS of 75 to 85 MPH.
I dont care to get off subject of the FJR, I know there are those out there that will defend a 5 speed and that is fine if it works for you, Im just talking about my experience, why I will not buy a bike without a 6 and that of many who do my type of riding.
A 5 speed transmission is a cost savings to the manufacturer, you wont find many 5 speeds in many high performance vehicles of any type, 2 wheel or 4 wheel. Again, if you dont do true interstate speeds for long distances or if it doesnt matter to you thats great, to others it does.
Here you go, from Cycle Word Magazine ... "One thing is for certain: The six-speed transmission is a godsend! The FJR has never really been buzzy, but shifting into top gear the motor is so smooth, it’s eerie. Cruising at 75 mph, the engine is barely turning 3500 rpm. Yamaha claims the helical gears make for smoother shifting and smoother running, and we’d have to agree."
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