Harley Speedos
Road Captain
Joined: Aug 2018
Posts: 587
Likes: 312
From: here n there
when you buy a gps who did you take it to for calabration?? you really think its correct?? come dudes. this is the best we can come up with?? the only real way it can be checked is ask a cop if hes willing to check your scoot with radar. now iam not talking about radar on some crappy phone. really?? now i know you dont like me saying this about your 30.000.00 bike. and iam not putting this on anybody iam just stating facts. just to see what i get back 
Road Master
Joined: Dec 2016
Posts: 777
Likes: 359
From: St. Louis, MO
yes the only time it will have certified on the speedo is when the head and or the odometer has been change. its the the law who ever changed it like a delalership has to put that sticker on it. or like in a car or truck if you change out tires to either smaller or larger tires it will be wrong,and then you have to change the gear in the transmission to match the tires. just saying all harleys speedos are not correct.
and most likely other brands as well.
and most likely other brands as well.
Seasoned HDF Member
Joined: May 2019
Posts: 5,894
Likes: 11,322
From: NE Ohio
my speedo is off (reads faster than actual)
^^That^^ according to the roadside radar units first mentioned in post 10
those suggesting it's common for other vehicles to read faster than actual hasn't been my experience (when unmodified)
all my other vehicles have been on the money when going by those radar units
..L.T.A.
^^That^^ according to the roadside radar units first mentioned in post 10
those suggesting it's common for other vehicles to read faster than actual hasn't been my experience (when unmodified)
all my other vehicles have been on the money when going by those radar units
..L.T.A.
Last edited by Cap77; Jan 13, 2020 at 06:52 PM.
Seasoned HDF Member
Joined: Mar 2008
Posts: 9,384
Likes: 1,776
From: Central Texas
My Road King is exactly 5 MPH off, If it says I am doing 80, I am only going 75. It became that away as soon as I took the 66 tooth pulley off and put the 68 tooth Sportster pulley on. other than that it is on the money. I checked it with the radar sitting on the side of the road that said "your speed is _ _ ."
Seasoned HDF Member
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
yes the only time it will have certified on the speedo is when the head and or the odometer has been change. its the the law who ever changed it like a delalership has to put that sticker on it. or like in a car or truck if you change out tires to either smaller or larger tires it will be wrong,and then you have to change the gear in the transmission to match the tires. just saying all harleys speedos are not correct. and most likely other brands as well.
and most likely other brands as well.for the record, the speedo on my 2002 sportster was 'certified'.
Last edited by skratch; Jan 13, 2020 at 07:43 PM.
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