T120 Speedo-Odometer error? - Triumph Forum: Triumph Rat Motorcycle Forums
Water Cooled Twins Talk Discussion of water cooled Triumph Twin related matters and topics.

 1Likes
  • 1 Post By FourtyFourty99
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 06-19-2017, 03:18 PM Thread Starter
Grand Prix 500
Main Motorcycle: 2016 T120 Bonneville
Senior Member
 
Soulkicker's Avatar
 
Join Date: Aug 2016
Location: Near Denver Colorado, USA
Posts: 149
Other Motorcycle: 1977 KZ1000A
T120 Speedo-Odometer error?

2016 T120

Has anyone checked there speedo and OD against other vehicles or devices?
I've been messing with it over the weekend against my son's 2016 Ford and my very accurate GPS.

I am a bit disappointed to find that at an indicated 40mph my true speed is 37mph and at 90mph my true speed is 84mph.
That is as bad as my 40 year old Kawasaki mechanical speedo/OD, which works with an archaic, cable shaft drive, spinning magnet in a cone connected to a needle!

I guess that would be about +6% error across the 0-100mph range.

If my OD displays are off this much too, this now substantially changes what I though my killer fuel 65mpg-72mpg economy has been.... dang it.

Anyone else?
Are the electronics calibrateable?
Soulkicker is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 06-19-2017, 03:36 PM
Grand Prix 250
Main Motorcycle: '17 Bonneville T120 Black
Member
 
FourtyFourty99's Avatar
 
Join Date: May 2017
Location: Oakridge, TX
Posts: 54
Garage
I've never come across a motorcycle with an accurate speedometer. Even most vehicles are off by a few miles. I can't recall if the speedometer is installed in the front hub or part of the transmission. It's typically left to have some margin of error in case the owner switches tire profiles.
saddlebag likes this.

.
FourtyFourty99 is offline  
post #3 of 6 (permalink) Old 06-22-2017, 09:42 AM
Grand Prix 125
Main Motorcycle: Triumph T120 2017
Member
 
circuit_78's Avatar
 
Join Date: Nov 2015
Location: Singapore
Posts: 33
Other Motorcycle: ...
Extra Motorcycle: Nil
Garage
so far among all the bikes I have... only digit ones from the sports bike etc are bang on... the rest as long as a needle involve , is always reading higher than actual.

well trick u ride slower ahahhaha

2015 t.scrambler _ 2009 yamaha r1 _ 2008 honda xr400 _ 2007 suzuki rm250 _ 2006 honda super4 _ 1996 ktm125
circuit_78 is online now  
 
post #4 of 6 (permalink) Old 06-22-2017, 01:31 PM
Grand Prix 500
Main Motorcycle: 2017 Bonneville T120
Senior Member
 
Dougl1000's Avatar
 
Join Date: Jul 2012
Location: Reno
Posts: 112
Reading 6% high is almost exactly what they did with the Rocket. It's a built in incentive not to break the speed limit.
Dougl1000 is offline  
post #5 of 6 (permalink) Old 06-22-2017, 01:38 PM
Grand Prix 125
Main Motorcycle: 2010 Bonneville base
New Member
 
Seadog49's Avatar
 
Join Date: May 2017
Posts: 29
Other Motorcycle: '64 Honda CB77 Superhawk
Mine's even worse than 6%. Speedo reads 45 and I'm actually at 38.
Seadog49 is online now  
post #6 of 6 (permalink) Old 06-22-2017, 01:44 PM
Team Owner
Main Motorcycle: '09 T100 EFi
Senior Member
 
lambroving's Avatar
 
Join Date: Sep 2009
Location: Central Virginia
Posts: 5,062
Other Motorcycle: Monster 796 ABS "Pantah"
Extra Motorcycle: K100RS 16/ABS
Garage
Quote:
Originally Posted by Soulkicker View Post
2016 T120

Has anyone checked there speedo and OD against other vehicles or devices?
Not sure where YOU'VE been...

ALL motorcycle speedos read optimistically. It's apparently a legal requirement in many countries. Your odometer should be bang-on however..., provided you have air in your tires...

FWIW, Ducati's with ABS read exactly +10% but mileage is dead accurate.

'09 T-100 Forest Green / New England White, TORs, Intiminators & fork tubes raised 15mm, Chrome Ikon 7610 - SP8 Shocks, Custom Sargent Saddle, OEM Chrome Grab Rail, Conti Road Attack 2 EVO's 110/80VR19 & 150/70VR17, 7" Cibie lens and uprated H4 bulb.
lambroving is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options
All posts must adhere to Forum Rules

Register Now



In order to be able to post messages on the Triumph Forum: Triumph Rat Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter your valid email address, that can receive an automated confirmation message. Otherwise, you won't be able to gain full access.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Speedo drive rubbing on hub - what's wrong? mmanasas Classic, Vintage & Veteran 2 05-26-2017 02:21 PM
2016 Triumph T120 Vs. Indian Scout u6crash Biker Hang-Out 44 04-01-2017 12:05 PM
T120, first gear ratios, error? Soulkicker Water Cooled Twins Technical Talk 7 02-21-2017 08:08 PM
Speedo, 6mph out on t120 oskar866 Classic, Vintage & Veteran 27 12-08-2016 04:37 AM
Triumph T120 alternative adamtal Water Cooled Twins Talk 43 10-24-2016 08:56 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome