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(03-25-2022, 08:07 PM)TriangleRider Wrote: https://www.cycleworld.com/sport-rider/h...emperature.
" Speedometer accuracy is very dependent on tire diameter, which is affected significantly on a motorcycle by pressure, load, and temperature."
Yeah I see this whenever this topic comes up, and while it is clearly true (it is geometry after all) it does not diminish the fact that there are other vehicles / bikes that manage to tell speed accurately. The same rules apply to all, and some bikes seem to not be able to do this as well as others. In my RS's case the tires are stock and kept at the [bike] manufacturer's specified pressures at all times, and the deltas don't appreciably change as the tires warm up.
Regards,
Grumpy Goat
2016 BMW R1200RS
2023 Triumph Tiger 900 Rally Pro
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About 100 years ago, I was on a long trip with lots of Interstate to be bored with. I started using mile markers to check odometer accuracy in my boredom. Start of trip to late in the trip I measured about 3% increase in distance gain with a worn tire compared to the new one I started with. YMMV. Just throwing that out there. How's your OCD?
Frank
'23 R1250RS, 9000 mi. 1 yr., '03 R1100S BCR #6/200, '85 K100/1100RS- 38 yrs. 331,000 mi., '17R1200RS- 51,054 mi. (gone), '16 R1200RS- 28,322 mi. (gone), '11 R1200RT-30,000 mi. (gone), '05 R1200ST-58,000 mi. (gone), '96 Ducati 900SS/SP-89,000 mi. (gone), 560K+ BMW miles
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Funnily enough, decreasing with age as it sometimes wastes too much time. On the other hand the tolerance for nonsense I don’t like is also decreasing. Rapidly.  Maybe getting more grumpy.
Regards,
Grumpy Goat
2016 BMW R1200RS
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(03-26-2022, 04:38 AM)Duckbubbles Wrote: About 100 years ago, I was on a long trip with lots of Interstate to be bored with. I started using mile markers to check odometer accuracy in my boredom.
I also did that before but started losing track of the markers and gave up. Every time. 
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Grumpy Goat
2016 BMW R1200RS
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(03-25-2022, 08:07 PM)TriangleRider Wrote: https://www.cycleworld.com/sport-rider/h...emperature.
Sent from my SM-G781U using Tapatalk
Yep, that's pretty much what they've been saying on the RS site.
Still think it's a dumb law.
Not sure about the ECU reflash.
If your bike is out of warranty and there's a trusted tuner in your area a guy could ask.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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(03-26-2022, 06:38 AM)Grumpy Goat Wrote: (03-26-2022, 04:38 AM)Duckbubbles Wrote: About 100 years ago, I was on a long trip with lots of Interstate to be bored with. I started using mile markers to check odometer accuracy in my boredom.
I also did that before but started losing track of the markers and gave up. Every time.
As i remember, I would start at a "10" or "20' and so forth to help me keep it straight- like the road! Did that for 10 miles at a time to keep the math in my head easier.
Frank
'23 R1250RS, 9000 mi. 1 yr., '03 R1100S BCR #6/200, '85 K100/1100RS- 38 yrs. 331,000 mi., '17R1200RS- 51,054 mi. (gone), '16 R1200RS- 28,322 mi. (gone), '11 R1200RT-30,000 mi. (gone), '05 R1200ST-58,000 mi. (gone), '96 Ducati 900SS/SP-89,000 mi. (gone), 560K+ BMW miles
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(03-26-2022, 05:05 PM)Duckbubbles Wrote: As i remember, I would start at a "10" or "20' and so forth to help me keep it straight- like the road! Did that for 10 miles at a time to keep the math in my head easier.
Frank
I did the same thing before GPS. Start with a mile marker of a even 10 and time it for 10 miles.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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Day before yesterday in Texas we were on some open two lane roads where I could use the cruise . Setting the cruise at 82 mph the GPS would show 80.
Sure is nice having 70 and 75 mph speed limits on two lane roads.
Lee
Iowa, USA
2022 R1250RS White Sport
Past BMWs: 2016 R1200RS x 2, 2011 K1300S x 2, 2003 K1200RS x 2, 1991 K75S x 2, 1987 K75T x 2, 1984 R100RT
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