Speedo Problem
Speedo Problem
Wondering if anyone can help me with this issue. Got back from a little road trip and think there may be a problem with my speedo. I have a HD combination Digital Speedo/Tac 4in model in my 11 FXDWG. At the end of the trip my speedo is registering 1156.5 and my buddies a 14 Street Glide Special is reading 1199.9, that is a 43.4mi difference. Even though we road the exact same distance. my speedo always read about 1-2mi below the speed limit but my buddy was cruise controlling it at about 1-2 mi over the speed limit. I asked about half way through why he was going slower than the limit and he informed me he wasnt. Not sure how I go about correcting this issue...if there even is an issue, as it could be his bike thats off. but considering his is newer than mine and I have swapped out the speedo i feel its more than likely me. any suggestions?
Last edited by MacKo2000; Oct 28, 2014 at 09:09 PM.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
That's around 3% difference, so to be frank it's within the expected degree of accuracy of speedos. They are not precisely accurate and never can be, due to variations of tyre diameter between tyre brands, plus tyre wear. If you were to do the same excercise on your own bike with a brand new tyre, then again with a worn out one, there will be a difference of around 3%!
So IMHO there is no problem, ride on and enjoy.
So IMHO there is no problem, ride on and enjoy.
I do have a GPS watch I got for when I run and its pretty accurate/consistent. Ill have to give it a try. But Im not to concerned with it. I don't think Its something that puts me a risk for injury or worse my bike not starting.
Road Warrior
Joined: Mar 2010
Posts: 1,290
Likes: 7
From: D/FW Texas
I see in your signature you're using a tuner; you should be able to change the speedo calibration in one of the setup menus. Trust GPS for your most accurate reference.
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