 Speedo accuracy????
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Joined: Nov 2009
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I pretty much run the speed limit or a few over. Have been wondering why everyone else is going to fast. My Triumph mechanic told me today that Triumphs usually run about 10% slow on the speedometer. Which makes sense why people are passing me so much. Do others find this too? He said it's because of the conversion from kilometers to miles. Thanks.
Have a heart that never hardens, a temper that never tires, a touch that never hurts. - Charles Dickens
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Re: Speedo accuracy????
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Joined: Feb 2010
Posts: 245
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Joined: Feb 2010
Posts: 245 |
im not sure why..but i have three Triumphs in my garage ,,,all different models (not all mine) and all give different mph readings at the same time,,,all wrong ..tested against two cars on the freeway one evening...kinda funny ,kinda not funny
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Re: Speedo accuracy????
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Joined: Mar 2005
Posts: 2,419
Oil Expert
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Oil Expert
Joined: Mar 2005
Posts: 2,419 |
I doubt it's because of the conversion because the metric speedos are out also. I think anything from 5 to 10% faster than you're really doing is common. New cars here all tend to read fast - I think the manufacturers are trying to avoid law suits - erring on the safe side of incorrect speedo readings.
Cheers, Richard
~~~~~~~~~~~~
09 America, Staintune Pipes, K&N, Breathe, Hagon Nitros, AI & O2 removed, tune 20184 (modified), MTX-L a/f gauge
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Re: Speedo accuracy????
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Joined: Feb 2010
Posts: 245
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Posts: 245 |
i also tested with my handheld GPS 10% off
Last edited by paulypfr; 04/26/2011 11:43 PM.
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Re: Speedo accuracy????
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Joined: Jan 2005
Posts: 12,164 Likes: 1
Should be Riding
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Should be Riding
Joined: Jan 2005
Posts: 12,164 Likes: 1 |
Mine is about 10% off (not 10mph, 10%).
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Re: Speedo accuracy????
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Joined: Mar 2007
Posts: 5,616
Check Pants
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Check Pants
Joined: Mar 2007
Posts: 5,616 |
Mine is good to 30mph then it gets progressively slower... but I stick with about 5mph off over 30mph. I stay on the low side of 5mph over shown speed up to about 60. Once I get up over 60 I try and stay on the high side of 5mph over shown speed...and I run a GPS with a speedo feature so I usually use that anyway 
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
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Re: Speedo accuracy????
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Joined: Nov 2009
Posts: 713
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Joined: Nov 2009
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Glad to know it's not just me
Have a heart that never hardens, a temper that never tires, a touch that never hurts. - Charles Dickens
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Re: Speedo accuracy????
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Joined: Mar 2009
Posts: 12,964
Stickman Yogi
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Stickman Yogi
Joined: Mar 2009
Posts: 12,964 |
Mine would exaggerated my speed by about a few %. That was when it actually worked. I wanted to make it into a clock. It's gone now.
Live to love, love to live.
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Re: Speedo accuracy????
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Joined: Jun 2009
Posts: 507
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Joined: Jun 2009
Posts: 507 |
Quote:
Mine is about 10% off (not 10mph, 10%).
+1. Speedo shows 77, I'm really going 70 mph.
2005 Speedmaster, Tornado Red, AI removed, Uni Pods, JCW 19" turnouts
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Re: Speedo accuracy????
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Joined: Jul 2006
Posts: 853
3/4 Throttle
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3/4 Throttle
Joined: Jul 2006
Posts: 853 |
This has been an ongoing discussion on sport bike forums..Most bike speedo's are off by 5%-10% slow
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Re: Speedo accuracy????
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Joined: Feb 2010
Posts: 538
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This all really good to know so I am NOT really going too fast cause we all Know the 08 Black and Red SpeedMASTER are the FASTEST.. Or so i think when really I am not doing 90 
Are we there YET? I gotta go pee!!
08 SpeedMASTER, Black and Red!
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Re: Speedo accuracy????
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Joined: Nov 2009
Posts: 713
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OP
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Joined: Nov 2009
Posts: 713 |
It must be so disappointing for you 
Have a heart that never hardens, a temper that never tires, a touch that never hurts. - Charles Dickens
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Re: Speedo accuracy????
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Joined: Mar 2010
Posts: 13
Complete Newb
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Complete Newb
Joined: Mar 2010
Posts: 13 |
Yeah, mine's off by about 10% as well, when it actually works that is. More than half the time I'm on the bike the speedo is like this: http://www.youtube.com/watch?v=ryLH7vzPHns
mike '03 Speedmaster
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Re: Speedo accuracy????
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Joined: Sep 2006
Posts: 231
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Mine bounced all over the place after about 8000 miles. Ended up buying a new one. I had moved about 500 miles from the original dealer, and the dealer closest to me didn't want to help. So I just bought a new one and it is still working fine after 25000 miles. Seems to be about 10% off too!
Ted
Send lawyers, guns and money, cause the sh*t has hit the fan!
-W. Zevon
2020 Bud Ekins T100
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Re: Speedo accuracy????
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Joined: Jul 2007
Posts: 6,060 Likes: 6
Worn Saddle
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Worn Saddle
Joined: Jul 2007
Posts: 6,060 Likes: 6 |
I must have one of the few that is spot on. (02) I've had it checked twice by police radar, and it clocks exactly to mile posts.
Fidelis et Fortis
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