Speedometer Readings off, Why?
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Joined: May 2013
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From: Toronto
Speedometer Readings off, Why?
Range of km left is off. Shows empty on gauge but on fillup only takes 19litres when it will hold 22l (6 gal.)
Riding with friend who has same motor 114ci, my speedo shows 120km/h his reads 110km/hr.
I have replaced diameter of front wheel with 19" mag from HD, 2018 Tri-Glide.
I have DK Tank lift: 1.5" front, ˝" on rear of tank.
Any suggestions? Is there a way to re-calibrate so speed and Range can be corrected?
Riding with friend who has same motor 114ci, my speedo shows 120km/h his reads 110km/hr.
I have replaced diameter of front wheel with 19" mag from HD, 2018 Tri-Glide.
I have DK Tank lift: 1.5" front, ˝" on rear of tank.
Any suggestions? Is there a way to re-calibrate so speed and Range can be corrected?
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,145
Likes: 6,168
From: SE Michigan
Yes, with a Power Vision. Other tuners also allow you to calibrate the speedo. But the speedo from the manufacturer will always read high - liability, variability in tire pressure, wear etc.
Range will always be inaccurate, very difficult to calculate and discern how you will be riding in the future with your remaining gas. Is your car's range that accurate? Doubtful.
PowerVision_SPEEDOMETER_READING_INCORRECTLY.pdf (fuelmotousa.com)
Range will always be inaccurate, very difficult to calculate and discern how you will be riding in the future with your remaining gas. Is your car's range that accurate? Doubtful.
PowerVision_SPEEDOMETER_READING_INCORRECTLY.pdf (fuelmotousa.com)
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From: Toronto
I understand Range is not accurate, but mine shows 50-75km less than my riding buddy's with same motor, less cam. I understand that the RANGE issue and the MPH issue may be two different things and further confused by tank lift.
Grand HDF Member
Joined: Jan 2012
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From: Oklahoma
I see you have a trike. My understanding (don't know for certain) that the trikes are geared differently from the bikes, lower overall gearing. If the speedo still gets its signal from the transmission, the lower gearing could be causing your high speedo reading IF your tune was for a two wheeler and included the pulse rate for a two wheeler. Just a wild guess that others may agree or disagree with. I also suspect your cam will deliver slightly reduced fuel economy compared to your buddies" unmodified engines. Speed/power is not free.
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From: Toronto
Thanks for your reply. I understand that trikes vs 2 wheelers have different gear ratios. I do understand the cam will decrease mpg/kpl as well. What I don't get is my friend also riding a tri-glide 114CI M8 was indicating 100km/h while at the same time my speedo registered 120km/hr.
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From: Watertown, CT
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From: Toronto
Well I did think of that but there were others on the trip who were all at the same speed. I was 'odd man out' and that argument was lost. 
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From: Bates County MO
Range of km left is off. Shows empty on gauge but on fillup only takes 19litres when it will hold 22l (6 gal.)
Riding with friend who has same motor 114ci, my speedo shows 120km/h his reads 110km/hr.
I have replaced diameter of front wheel with 19" mag from HD, 2018 Tri-Glide.
I have DK Tank lift: 1.5" front, ˝" on rear of tank.
Any suggestions? Is there a way to re-calibrate so speed and Range can be corrected?
Riding with friend who has same motor 114ci, my speedo shows 120km/h his reads 110km/hr.
I have replaced diameter of front wheel with 19" mag from HD, 2018 Tri-Glide.
I have DK Tank lift: 1.5" front, ˝" on rear of tank.
Any suggestions? Is there a way to re-calibrate so speed and Range can be corrected?
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Joined: May 2013
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From: Toronto
Thanks. I will have the bike in the shop on the 1st of July to check out the tune and replace cool fan switch at same time as it also has to be flashed..
Appreciate your help and knowledge
Appreciate your help and knowledge