speedometer not acurate
Extreme HDF Member
Joined: Dec 2006
Posts: 10,045
Likes: 36
From: ST. Louis
Like drbillk said, if I gave a crap mine says
71 on the Street Glide and 68 on the GPS (Garmin nuvi 760)
71 in my Chrysler Aspen and 71 on the same GPS
71 in my wife's Buick Enclave and 71 on the same GPS
At least this should help me from getting a ticket on the Street Glide.
I don't ride 3 mph faster just to accomidate it.
I just ride and enjoy it.
71 on the Street Glide and 68 on the GPS (Garmin nuvi 760)
71 in my Chrysler Aspen and 71 on the same GPS
71 in my wife's Buick Enclave and 71 on the same GPS
At least this should help me from getting a ticket on the Street Glide.
I don't ride 3 mph faster just to accomidate it.
I just ride and enjoy it.
Road Warrior
Joined: Mar 2007
Posts: 1,383
Likes: 3
From: Texas City, TX
Back on topic, until the Civic, I've never had a vehicle (2 or 4 wheeled) that wasn't at least 2 to 4 mph optimistic. The worse one was an '83 BMW R80RT that read 8 mph fast.
Thanks & Ride Safe,
Steve R.
Road Captain
Joined: Oct 2007
Posts: 602
Likes: 2
From: Lakewood, N.J.
Like Texas Fat boy said........ and I only use mine to find the next watering hole anyway.
Last edited by RoadKing_Al; Oct 15, 2008 at 02:05 PM.
Cruiser
Joined: May 2008
Posts: 236
Likes: 0
From: The A T L
Please excuse the minor hijack here but I'm curious. Tim, I also have Honda Civic (06 model) and an old Garmin GPS (monochrome screen) and it's dead on with the Civic. My car has the Honda factory GPS in it and I thought that might have something to do with the speedo accuracy. Does your Civic have the factory GPS? I'm just curious if that's what's making the difference.
Back on topic, until the Civic, I've never had a vehicle (2 or 4 wheeled) that wasn't at least 2 to 4 mph optimistic. The worse one was an '83 BMW R80RT that read 8 mph fast.
Thanks & Ride Safe,
Steve R.
Back on topic, until the Civic, I've never had a vehicle (2 or 4 wheeled) that wasn't at least 2 to 4 mph optimistic. The worse one was an '83 BMW R80RT that read 8 mph fast.
Thanks & Ride Safe,
Steve R.
NO I don't have a GPS in the car. I use the Garmin Streetpilot. I also just upgraded my maps and it was worth doing it as I just took a trip to the Grand Canyon last week. Also my Civic is a Si. he he!
Grand HDF Member
Joined: Oct 2004
Posts: 3,842
Likes: 502
From: Northern WV
Maybe HD didn't re-calibrate the 09? The new rear tire is 1 1/2% smaller diameter than the 08-prior.
MU85B16 25.71 Diameter = 80.75"
180/65-16 25.30 Diameter = 79.48"
My 04 Dyna was only off 2-3%. My GL1800 speedo was off 9%! The Odometer was closer to accurate.
MU85B16 25.71 Diameter = 80.75"
180/65-16 25.30 Diameter = 79.48"
My 04 Dyna was only off 2-3%. My GL1800 speedo was off 9%! The Odometer was closer to accurate.
Road Warrior
Joined: Mar 2007
Posts: 1,383
Likes: 3
From: Texas City, TX
Thanks for that. The Honda factory GPS doesn't display vehicle speed directly so I thought it might influence the cars speedometer but I guess not. I've got an old Garman Streetpilot with monochrome screen and I checked it against the cars instrumentation and it turned out to be within .5 mph just about everywhere. I guess it is possible for a manufacturer to accurately callibrate a speedometer. It's unfortunate that most don't seem to bother.
Ride Safe,
Steve R.
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Road Master
Joined: Sep 2005
Posts: 1,231
Likes: 1
From: Texas
My speedometer accuracy depends on how new the tires are. When they are new, it reads higher than the GPS and when they are worn out, it reads the same or lower than the GPS, depending on how far I wear them out...
Grand HDF Member
Joined: Dec 2007
Posts: 4,999
Likes: 55
From: Bay Area
Mine is off 4-6 mph depending on speed 80=78, 110=104 as compared to my zumo. I changed the out put sprocket tho. I bought the dakota calibrater, I will put it in this winter. Im thinking with this I can turn the speedo speed down and fool the cruise control to work over 85 mph's