HOW to Test Speedometer - Suzuki GSX-R Motorcycle Forums Gixxer.com
 7Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 28 (permalink) Old 01-24-2017, 12:11 AM Thread Starter
Provisional Novice
 
Join Date: Oct 2016
Posts: 106
HOW to Test Speedometer

Hello guys . I have gsxr 1000 L2. I changed sprocket +2 rear but speedometer shows me 299 anyway. want to test its real 299 or speedometer counts wrong.

I try some applications of speedometer on my android phone but none of them works well becouse almost all of them have speed limit and can not count 300km . So please if anyone know good application for my mobile to test my speed normaly please tell me the program
Suzi1000 is offline  
Sponsored Links
Advertisement
 
post #2 of 28 (permalink) Old 01-24-2017, 12:18 AM
Ex-Lady Supermod

 
Join Date: Jul 2008
Posts: 16,129
Garage
Re: HOW to Test Speedometer

Can't help you with an app but will say speedometer is wrong. Speedometer was wrong from the factory anywhere from 5-12%. Mine was off 9.58% from the factory with stock sprockets.
Samantha750 is offline  
post #3 of 28 (permalink) Old 01-24-2017, 01:16 AM Thread Starter
Provisional Novice
 
Join Date: Oct 2016
Posts: 106
If anyone know with -1 +2 on gsxr 1000 what will be mine real top speed ?
Suzi1000 is offline  
Sponsored Links
Advertisement
 
post #4 of 28 (permalink) Old 01-24-2017, 01:24 AM
Expert
 
Join Date: Dec 2013
Location: Dat ass
Motorcycle: SRAD
Posts: 2,733
Re: HOW to Test Speedometer

Gearingcommander.com
1Slowrider is offline  
post #5 of 28 (permalink) Old 01-24-2017, 02:04 AM
Ex-Lady Supermod

 
Join Date: Jul 2008
Posts: 16,129
Garage
Re: HOW to Test Speedometer

Quote:
Originally Posted by Suzi1000 View Post
If anyone know with -1 +2 on gsxr 1000 what will be mine real top speed ?
No but it will be less then before you changed the sprockets. As for even guessing what top speed you can/could achieve, that is impossible as there are so many variables to take into account.
Samantha750 is offline  
post #6 of 28 (permalink) Old 01-24-2017, 02:35 AM Thread Starter
Provisional Novice
 
Join Date: Oct 2016
Posts: 106
And one question . I know that even stock motorcycle does not show real speed in speedometer but it writes 299 . And when changing sprockets even if you will change -1 +6 speedometer will write 299 anyway ?
Suzi1000 is offline  
post #7 of 28 (permalink) Old 01-24-2017, 02:45 AM
Ex-Lady Supermod

 
Join Date: Jul 2008
Posts: 16,129
Garage
Re: HOW to Test Speedometer

The speedometer cannot exceed 299 kph (186 mph) which is the maximum speed the bike can achieve under perfect conditions by agreement of all motorcycle manufacturers.
Samantha750 is offline  
post #8 of 28 (permalink) Old 01-24-2017, 04:00 AM
Guest
 
oldgixxer's Avatar
 
Join Date: Jan 2001
Location: In the garage, smoking one of Anthony D's cigars...
Motorcycle: None, gave them all to Anthony D...
Posts: 24,541
Re: HOW to Test Speedometer

Quote:
Originally Posted by Suzi1000 View Post
If anyone know with -1 +2 on gsxr 1000 what will be mine real top speed ?
Off the top of my head you'll be losing 15mph+ from the top end with that gearing
oldgixxer is offline  
post #9 of 28 (permalink) Old 01-24-2017, 04:28 AM Thread Starter
Provisional Novice
 
Join Date: Oct 2016
Posts: 106
Oldgixxer I will lose 15 mph but in speedometre will be written 299 anyway ? Or it will write maxumum 280 on speedometre ?
Suzi1000 is offline  
post #10 of 28 (permalink) Old 01-24-2017, 04:32 AM
Ex-Lady Supermod

 
Join Date: Jul 2008
Posts: 16,129
Garage
Re: HOW to Test Speedometer

Does it matter? Even before the sprocket change, factoring in a 10% for speedometer error, your speedo says 299 but in reality you were going 269. Odds are you were not going to get a true and authentic 299.
Samantha750 is offline  
post #11 of 28 (permalink) Old 01-24-2017, 04:42 AM Thread Starter
Provisional Novice
 
Join Date: Oct 2016
Posts: 106
I understand that its not real 299 even factory sprocket but speedometer shows 299. But i am interested if i will change sprockets speedometere will write same 299 or less ?
Suzi1000 is offline  
post #12 of 28 (permalink) Old 01-24-2017, 05:37 AM
Soberz again
 
Carnage's Avatar
 
Join Date: Jan 2001
Location: was Boston, now Orlando
Motorcycle: 2006 GSX-R1000
Posts: 14,889
Garage
Re: HOW to Test Speedometer

-JK750- likes this.
Carnage is online now  
post #13 of 28 (permalink) Old 01-24-2017, 11:57 AM
You should listen to me. No, seriously, listen to me.
 
Join Date: Oct 2008
Location: Santa Barbara
Motorcycle: Blue 2006 GSX-R1000
Posts: 7,500
Re: HOW to Test Speedometer

Thank you Carnage. +1
Carnage, -JK750- and Todd_Sails like this.
BillV is offline  
post #14 of 28 (permalink) Old 01-24-2017, 02:41 PM
Captain Obvious ... because obviously it’s obvious.
 
Just_Nick's Avatar
 
Join Date: Jul 2009
Motorcycle: 2006 GSXR "250"
Posts: 3,834
Garage
Re: HOW to Test Speedometer

Quote:
Originally Posted by Suzi1000 View Post
I understand that its not real 299 even factory sprocket but speedometer shows 299. But i am interested if i will change sprockets speedometere will write same 299 or less ?
If it shows less, just modify your ECU for a higher rev limiter, that'll fix it.
Just_Nick is offline  
post #15 of 28 (permalink) Old 01-24-2017, 02:46 PM
Track Day Winner
 
Join Date: Sep 2014
Motorcycle: 2013 GSXR 1000ZL3
Posts: 59
Re: HOW to Test Speedometer

OEM speedo error is approx 6%. On stock gearing (or 43T at the rear) my L3 showed 275 kph on the GPS vs 299 kph on a speedo so I bought Healtech X-TRE + Speedohealer and now it's 100% accurate. Currently I'm using -1/+2 520 conversion so my top speed is lower than stock but who cares when bike rides better..
marider is offline  
post #16 of 28 (permalink) Old 01-24-2017, 02:47 PM
Expert
 
maniac1886's Avatar
 
Join Date: Jan 2016
Location: Flint, Mi
Posts: 2,088
Garage
Re: HOW to Test Speedometer

It's gunna show 299, but you won't be going anywhere near that fast. Use a GPS, or buzz a cop. That's the best way to get your actual speed.

Disclaimer: the cops gunna be pretty offended when he tells you how fast you were actually going.

Speedo healers can be used to correct the speed, but will throw off the mileage. You get one or the other.
maniac1886 is offline  
post #17 of 28 (permalink) Old 01-24-2017, 06:05 PM
Provisional Novice
 
Join Date: Mar 2002
Location: NY
Motorcycle: 97 SRAD 750, 86 GS550ES Based 'Frankenbike'
Posts: 102
Re: HOW to Test Speedometer

Quote:
Originally Posted by Samantha750 View Post
No but it will be less then before you changed the sprockets. As for even guessing what top speed you can/could achieve, that is impossible as there are so many variables to take into account.
Not necessarily - I've seen bikes gain top speed with lower gearing. It depends on RPM at top speed, and where in the torque curve it falls.

Quote:
Originally Posted by Suzi1000 View Post
And one question . I know that even stock motorcycle does not show real speed in speedometer but it writes 299 . And when changing sprockets even if you will change -1 +6 speedometer will write 299 anyway ?
That's because the speedometer is reading the engine output shaft, not wheel RPM.

Quote:
Originally Posted by oldgixxer View Post
Off the top of my head you'll be losing 15mph+ from the top end with that gearing
Assuming you can reach redline with stock gearing, and also with the new lower gearing, yes. More likely you're not hitting redline to start with.
Turbo2Pete is offline  
post #18 of 28 (permalink) Old 01-24-2017, 06:24 PM
Ex-Lady Supermod

 
Join Date: Jul 2008
Posts: 16,129
Garage
Re: HOW to Test Speedometer

Quote:
Originally Posted by Turbo2Pete View Post
Not necessarily - I've seen bikes gain top speed with lower gearing. It depends on RPM at top speed, and where in the torque curve it falls.
That goes against what every racer and anyone who changed their sprockets have said here but not going to argue it. As I have never monkeyed with my gearing and can only go by what others have reported, people like Moto_joe, Oldgixxer, SVS, Ant but I'm sure they don't know anything about these things.

Samantha750 is offline  
post #19 of 28 (permalink) Old 01-24-2017, 09:52 PM
Lifetime Premium
 
-JK750-'s Avatar
 
Join Date: Apr 2008
Location: Finland
Motorcycle: K5 1000 & K1 750
Posts: 3,476
Re: HOW to Test Speedometer

Quote:
Originally Posted by Samantha750 View Post
That goes against what every racer and anyone who changed their sprockets have said here but not going to argue it. As I have never monkeyed with my gearing and can only go by what others have reported, people like Moto_joe, Oldgixxer, SVS, Ant but I'm sure they don't know anything about these things.

600s don't have enough hp to reach rev limit in 6th gear so you might gain top speed with lower than stock gearing. Depends on the bike...

One guy was doing standing mile events and got the best result ~274km/h on his K1 750 with -1-1 gearing.
-JK750- is online now  
post #20 of 28 (permalink) Old 01-25-2017, 04:19 AM
Guest
 
oldgixxer's Avatar
 
Join Date: Jan 2001
Location: In the garage, smoking one of Anthony D's cigars...
Motorcycle: None, gave them all to Anthony D...
Posts: 24,541
Re: HOW to Test Speedometer

Quote:
Originally Posted by Turbo2Pete View Post
Assuming you can reach redline with stock gearing, and also with the new lower gearing, yes. More likely you're not hitting redline to start with.
Thank you for assuming I wasn't aware of this
oldgixxer is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Suzuki GSX-R Motorcycle Forums Gixxer.com 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 a valid email address for yourself.

Email Address:
OR

Log-in










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



Posting Rules  
You may post new threads
You may 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 On
Pingbacks are On
Refbacks are On

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