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How Accurate is the Speedo?
- Thread starter jamo
- Start date
jamo
New member
What? 97%! So when my speedo said 120 numerous times while I was passing a few cars on highway 14 between Richland Center and Lacrosse this weekend, I was actually doing only about115?
Once last year, I deceived to pass that fifth car and gave it a go. As I passed the speedo on my Bandit was 114. I looked over and the car said “Sheriff” on the door. He stopped me and wondered where I’d come from, but didn’t ticket me. He wasn’t on traffic duty.
Once last year, I deceived to pass that fifth car and gave it a go. As I passed the speedo on my Bandit was 114. I looked over and the car said “Sheriff” on the door. He stopped me and wondered where I’d come from, but didn’t ticket me. He wasn’t on traffic duty.
lee
Debbie's Servant
Before GPS I used to time myself for 10 miles on a interstate.
fmdualexhaust
Member
I can only speak for my R9T using a gps.
Anywhere from 3 to 6 MPH fast.
Seems the faster you go, the more optimistic it is.
Anywhere from 3 to 6 MPH fast.
Seems the faster you go, the more optimistic it is.
pglaves
#13338
When it comes to stupid that ranks right up there. The part labeled "Important Note" is as dumb as a box of rocks. It says, we know it is wrong and your GPS is right but use the speedometer anyway. Sheesh! The arrogance is astounding.
Gillie Dog
Old and Tired
Yep.
My Japanese, Italian and American made scooters were always right on even with new/different tires. But not my German one.
Obviously the Germans are smarter than the Japanese, Italians or Americans.
GD
My 2016 RS reads 135 GPS says 127. But It is pretty much Wrong even at low speeds 60 on the Speedo is about 57.
I hate the Display on this bike Speedo is the only thing readable above 60 and it is wrong. When I say readable I mean I am not going to look down long enough to get a view of the really important cues.
Gator in Dallas
I hate the Display on this bike Speedo is the only thing readable above 60 and it is wrong. When I say readable I mean I am not going to look down long enough to get a view of the really important cues.
Gator in Dallas
lee
Debbie's Servant
Can't remember at 100 but in the 75 to 80 mph range the speedometer reads 2.5 to 3 mph higher than the GPS.
Think about how fast one has to ride "just to keep up" out there in the Great Plains. Speed limits are frequently (usually?) your "keeping up" speed. I have driven so many miles at 85+ that I cannot even keep count.
Good luck.
I led a club ride a few weekends back. One of my pre ride statements was the fact that most of the bikes displayed at least 3-5mph slower than actual speed. My point was if I was going 70mph at the front by GPS or knowledge of the bike I was on, to not think I was speeding It always comes up.
Only the authority model RT's with a different gauge cluster is calibrated to actual speed...you know why they do that
The faceplate on the RT Authority even has wording to that effect the last time I looked.
Our KTM's are fairly spot on, none of our Beemers are. H is in the keeping pace mode anyways and she admits not a fixated on display person...works for her... I get to stop on the side of road and chat...she gets a pass
It always comes up.Only the authority model RT's with a different gauge cluster is calibrated to actual speed...you know why they do that
The faceplate on the RT Authority even has wording to that effect the last time I looked.Our KTM's are fairly spot on, none of our Beemers are. H is in the keeping pace mode anyways and she admits not a fixated on display person...works for her... I get to stop on the side of road and chat...she gets a pass
Run at 4K rpm, look at gps, divide speed by four, get mph/thousand rpm. Extrapolate. Mine is 16.8mph per thousand. Everything is taken into account. Tires, gear, etc. Warning, wait till yer stopped, off the bike, to do the division. Just saying, FWIW. Or just look at gps not the speedo.
WWeldin
Member
I was told there would be no math on this thread.
