K11 Owners Group

Grunter · Posted: Fri Oct 02, 2015 6:35 pm Post subject: Speedometer Accuracy

I have 2 GPS navigation units which I can use on the bike (One is an adapted car unit)

Both display the speed they suggest I am doing and both are pretty much the same, but neither agree with the bike speedometer.

If the bike speedometer is showing 30mph, the satnav(s) will show 28. At 40 on the speedo the satnav will be showing 37, and so on.

For each 10MPH increase in speed indicated by the bike's speedometer the satnav's show an increased discrepancy of about 3/4 mph so at 70 the satnav will be around 65 mph until 80 when it seems to stick at that level of difference.

So which is the most accurate the bike speedometer or the Satnav?
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1997 K1100LT
1994 R1100RS

Scott_Anderson · Posted: Fri Oct 02, 2015 9:27 pm Post subject:

The bike speedo's seem to be off between 5-10% by design.........

There is some adjustment you can make inside the cluster, but it's limited.

Read here:
http://www.k11og.org/forum/viewtopic.php?t=5696
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Ride safe.

1995 K1100LT 0302044
2017 FLHTK Ultra Limited
Garmin StreetPilot 2820
Garmin Zumo 550
Garmin Zumo XT
"One who does not ask questions is ashamed to learn" Danish proverb
1997 K1100LT 0302488(R.I.P.)
1997 R1100RT ZC62149(sold)

Jim · Posted: Fri Oct 02, 2015 10:03 pm Post subject:

I turned the screw - didn't bother with the soldering iron. Just sort of took a guess at how far to turn it. My speedo is about 1/10th of a mile off - maybe. Almost spot on. That's sure to get me in trouble one of these days...
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Jim
1997 K1100LTSE 94,000 - still has gremlins!
1995 R100RT Classic 16,650 crashed - repaired!
1992 K75RTP 46,000

"We shall not all die, but we shall all be changed."

jay k. · Posted: Tue Oct 06, 2015 5:23 pm Post subject:

I can only speak for my own bike...but it's off by a solid 10%...which sucks...but makes it easy to calculate your actual speed. 80 indicated is 72.
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'20 R1250RS - The RS
'96 K1100RS/SE - The Bagger
'05 R1100S Boxer Cup Replica - The Boxer
'14 Ducati Monster 1200S - The Duc
'84 Kawasaki GPz 1100 - The Gypsy

Flying Duck · Posted: Wed Oct 07, 2015 12:00 am Post subject:

Having owned 19 Ks the speedometer is always about 10% high.
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93 LT (x2)
94 RS
86-97 K75F(K75/100/1100 Frankenbrick)
86 K75C w/paralever, hi perf cams,TURBO!
91 & 92 K75Ss
91 K1
86 custom K100
14 WR250R
IBA #17739 (SS1K, BBG, 50CC)
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bikesnbones · Big Brick Rider Joined: 03 Aug 2014 Posts: 74

I had my bike on the dyno a little while back, and the tester noted that my speedo starts gradually under reading from 30 mph. By the time it's showing 70, the true speed is 61.
Sad