Quote:
Originally Posted by SnoGhost13
Never checked my 08 VT750C2 from the factory but after putting a Metzeler ME880 170/80-15 on the rear it is pretty dead on. Tells me I had to be a bit off with the original 160/80-15 back there.
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The front wheel drives the speedometer.
Quote:
Originally Posted by Earthling789
I don't think I've ever had a car/truck/bike that was 100% accurate on the speedometer... most err on the low side of actual speed.... up to 10%.
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By law in the U.S. Almost ALL of the cars I've had have been very, very accurate -- the biggest variation on Chrysler, Ford & GM products that I've had is way less than 2%. Almost every Honda car I've owned has been slightly (about 2%) off. Every bike I've owned (Honda or otherwise) has been off by 5% to 10%.
Quote:
Originally Posted by Carl722
I haven't looked yet but I thought the bike speedometer was on a cable from the front wheel. That is common for older bikes, I haven't paid attention to the newer bikes speedometers to know if they are run off the gear case, if they are the rear tire size would be a factor. Just changing the face plate won't correct the odometer running up mileage more than what the bike is doing.
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You don't need to look for YOUR bike if it is a 1999 VT1100C2 (aka 1100 Shadow A.C.E.) -- it is a mechanical system and you can NOT fix it with an electronic device. Changing the tire will, of course, have an affect -- but you won't be getting a 10% overstatement out that way.
And, yes, changing the faceplate will NOT affect the odometer. Although driven by the same cable, it runs on a different system inside the speedometer housing so it is NOT tied into the same error as the speedometer needle. It can be completely different -- even right on the mark. They are two different gauges driven off the same front tire but for all
practical purposes the tire is the only thing they have in common. Fixing the odometer, though, is NOT a question you have posed in this thread.
And you don't need to worry about other bikes having their speedometers driven by the gear case and/or rear tire.