To all the big brains out thereI have a speedo question for you.
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Right now I am getting about 130 to a tank and I am putting in about 4.8gal per fill-up. This equals just under 28mpg (indicated)
This Sux. (I have more words for it too). I have a roadtrip upcoming and I am doing whatever I can to get my gas mileage up as I prefer to drink my beer not on the side of the road while I wait for&nbsp\\;someone to bring me gas.&nbsp\\;
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I am running basic Stage 1 setup (V&amp\\;H true duals, Samson Exhaust, SE air cleaner, PC-III USB).
I have already used a variety of canned maps, and I am currently using a canned hi-mpg map I got courtesy of Jamie at FuelMoto (cannot say enough about the great prices and customer service/support at FuelMoto).
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Where does the speedo pick up the speed? Is it the front&nbsp\\;or rear wheel? In the transmission?
I know I can look into "The Big White Book of&nbsp\\;Fun"&nbsp\\;but I thought I would ask you all first.
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I am hoping my speedo is off due to my wheels, but you never know ... The bike runs healthy, and I am not too obnoxious&nbsp\\;with the throttle&nbsp\\;(I swear).&nbsp\\;
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My theory is that it is off d/t the larger wheel diameter, but that, my friends, is just a hopeful theory.
I have 120/70/21 front tire&nbsp\\;and a 150/70/18 rear tire on a 2004 EG standard.&nbsp\\;
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Anybody have any idea how I can get my speedo to convert to the new tire diameter?
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If that cannot be done, does anybody have any idea how I can figure out how much slower my wheel turns so I can do the big-brainded conversion to estimate my tank-to-tank range?
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Thanks

 

So I called Metzler yesterday to get tire diameters.
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The guy about fell over telling me how dangerous it is to ride a 21" on a bagger and that 'metzler is not liable' ...

Seriously, for at least 15 minutes I heard his diatribe how the engineers have not tested it and they would not be responsible.
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All I wanted to know was,
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What is the tire diameter.
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So. Finally,
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16" stock is 25.87" in overall height.
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21/120/70 is 27.8" overall height
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18" 150/70 is 26.26" overall height.
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Speedo is in the transmission so the rear tire is the conversion to use.
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Seems my mileage sux.
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back to the map.