Speedometer vs GPS - Can speedo be recalced?
Tourer
Joined: Jul 2006
Posts: 403
Likes: 0
From: Antioch, CA
RE: Speedometer vs GPS - Can speedo be recalced?
My 2007 Ultra speedometer reads about 5% fast\\; i.e., 80 mph indicated is about 76 mph actual. \\; I believe this to be fairly common on many bikes including Euro and Jap metrics based on test reports in Motorcycle Consumer News.
Road Warrior
Joined: Sep 2005
Posts: 1,942
Likes: 7
From: guntersville, al
RE: Speedometer vs GPS - Can speedo be recalced?
GPS is not accurate to an exact point. \\; Generally they are accurate to within 30 feet, that can account for the difference. \\; the speedo in my Titan is faster than my GPS by about 2 mph.
Ultimate HDF Member
Joined: Apr 2006
Posts: 6,913
Likes: 87
From:
RE: Speedometer vs GPS - Can speedo be recalced?
I asked at the dealership about recalibrating or replacing my speedo under warranty on my 07 RK because I thought it was about 4-5mph fast. I was told anything within 5mph is within standards. I'm not sure whose standards besides HD.
Thread Starter
|
Advanced
Joined: Apr 2008
Posts: 56
Likes: 0
From: Las Vegas, NV
RE: Speedometer vs GPS - Can speedo be recalced?
ORIGINAL: txfxstrider
I asked at the dealership about recalibrating or replacing my speedo under warranty on my 07 RK because I thought it was about 4-5mph fast. I was told anything within 5mph is within standards. I'm not sure whose standards besides HD.
I asked at the dealership about recalibrating or replacing my speedo under warranty on my 07 RK because I thought it was about 4-5mph fast. I was told anything within 5mph is within standards. I'm not sure whose standards besides HD.
Road Warrior
Joined: Apr 2007
Posts: 1,683
Likes: 2
From: Melissa, TX
RE: Speedometer vs GPS - Can speedo be recalced?
ORIGINAL: txfxstrider
I asked at the dealership about recalibrating or replacing my speedo under warranty on my 07 RK because I thought it was about 4-5mph fast. I was told anything within 5mph is within standards. I'm not sure whose standards besides HD.
I asked at the dealership about recalibrating or replacing my speedo under warranty on my 07 RK because I thought it was about 4-5mph fast. I was told anything within 5mph is within standards. I'm not sure whose standards besides HD.
Road Captain
Joined: Oct 2007
Posts: 619
Likes: 0
From:
RE: Speedometer vs GPS - Can speedo be recalced?
Dakota digital makes a module, runs just under $100 depending on where you order it... Works great but jury still out on whether it is compatible with 08 tourers
Outstanding HDF Member
Joined: May 2008
Posts: 2,009
Likes: 0
From: South Jersey
RE: Speedometer vs GPS - Can speedo be recalced?
The only thing that I drive that matches the GPS is my 95 Dodge Dakota 4X4. Everything else in general, The speebo reads faster than actual speed. \\;I looked into this on the auto end some years ago and the OE is allowed +or- some %. All the cars I have worked on are typically off around 3%. Some as high as \\;5. My 02 is 2% and my 04 is 6% both read fast.
Cruiser
Joined: Sep 2007
Posts: 160
Likes: 0
From: Central Louisiana
RE: Speedometer vs GPS - Can speedo be recalced?
My 2008 Ultra is also off about 5 MPH at 70. Not only is the speed off that much but also the odometer also reads more miles on the bike than the GPS. On a tank of gas, the GPS reads about 5-6 miles less than the odometer on the bike. I had a 2001 Gold Wing and it was also off about the same amount. Must be a bike thing.
Zapps
2008 Ultra
Zapps
2008 Ultra
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Outstanding HDF Member
Joined: Jul 2007
Posts: 2,004
Likes: 12
From: Parkton, Maryland
RE: Speedometer vs GPS - Can speedo be recalced?
The only bike I've found to be dead on with the GPS reading is my buddy's Screaming Eagle Fat Boy. Maybe the CVO uses calibrated speedos and the rest of us get seconds. Every roadside radar I've passed has \\;read the same as the GPS. Even my Dodge truck is off by 4mph at 70.
 \\;
By the way, the refresh rate for Garmin units is \\;once per second continuous, so don't count on \\;lag time as being the culprit.
 \\;
By the way, the refresh rate for Garmin units is \\;once per second continuous, so don't count on \\;lag time as being the culprit.
Banned
Joined: Apr 2008
Posts: 3,723
Likes: 0
From: New York
RE: Speedometer vs GPS - Can speedo be recalced?
Had the same problem with my 04 Sportster, was about 5 MPH under and also over stating milage. \\; After months of back and forth with the dealer HD come out with a service notice and a hot flash that fixed the problem. \\; Might be the same issue I would speak to the Dealer.