Speedo Overread by about 10% - SV650.org

17-01-11, 10:38 PM

My wife has just bought a 2005 SV650S to complement my CBR1100xx.

Yesterday while cruising (with intercoms) we noticed about a 10% higher speed on her bike to mine. I know that my CBR already reads a fraction high so that means her speedo is well overreading. Any ideas on where to start looking for this fault would be appreciated.

Regards
David

17-01-11, 10:52 PM

I'm no expert but I would check the tyres are the right size, I think that can chuck it out, 120/60/17 - 160/60/17 is what they should be. Also I think having the wrong sprockets could cause it, count the teeth on them.

17-01-11, 10:55 PM

much appreciated. Front tyre is a 60/120/17. Will look at the timing sprocket this evening but 10% is a funny number?

SoulKiss · 17-01-11, 11:00 PM

+10% is normal on SV's

Sid Squid · 17-01-11, 11:00 PM

Sprockets don't matter - speedo driven from front wheel.

10% is a strange number, the usual problems are:

Reading double 'cos it's got the wrong speedo drive in it.
Reading erratically - for a number of reasons.
Not doing anything as something is broken/disconnected.

If you find out what, if anything, is amiss, please tell us what you find, this is an unusual one.

18-01-11, 11:36 AM

Mine started reading much more accurately when i put a new front tyre on with a 70 profile rather than 60. So could be worn tyres or a slightly lower than standard profile.

18-01-11, 12:24 PM

Mine was 11.5% out on my zx6 due to general over read and small front sprocket so had to get a speedo healer, works great.

Check http://www.healtech-electronics.com/ here to see the % it should be over by.

Mej · 18-01-11, 03:23 PM

+ 10% is normal on most bikes i reckon

andrewsmith · 18-01-11, 03:56 PM

Quote:

Originally Posted by Mej

+ 10% is normal on most bikes i reckon

its used at the Rule of thumb by most bike instructors and isn't far off for some bikes

18-01-11, 04:27 PM

Its been mentioned a few times that the SV generally overreads around 10%

ps welcome to the org.

17-01-11, 10:38 PM	#1
DaveSkinner Guest Posts: n/a	Speedo Overread by about 10% My wife has just bought a 2005 SV650S to complement my CBR1100xx. Yesterday while cruising (with intercoms) we noticed about a 10% higher speed on her bike to mine. I know that my CBR already reads a fraction high so that means her speedo is well overreading. Any ideas on where to start looking for this fault would be appreciated. Regards David

17-01-11, 10:52 PM	#2
Jordy Guest Posts: n/a	Re: Speedo Overread by about 10% I'm no expert but I would check the tyres are the right size, I think that can chuck it out, 120/60/17 - 160/60/17 is what they should be. Also I think having the wrong sprockets could cause it, count the teeth on them. Last edited by Jordy; 17-01-11 at 10:55 PM.

17-01-11, 10:55 PM	#3
DaveSkinner Guest Posts: n/a	Re: Speedo Overread by about 10% much appreciated. Front tyre is a 60/120/17. Will look at the timing sprocket this evening but 10% is a funny number?

17-01-11, 11:00 PM	#4
SoulKiss Member Mega Poster Join Date: Jul 2006 Location: Sunny Croydonia Posts: 6,124	Re: Speedo Overread by about 10% +10% is normal on SV's __________________ Sent from my PC NOT using any Tapatalk type rubbish!! █╬╬╬╬(•)i¯i▀▀▀▀▀█Ξ███████████████████████████████)

17-01-11, 11:00 PM	#5
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: Speedo Overread by about 10% Sprockets don't matter - speedo driven from front wheel. 10% is a strange number, the usual problems are: Reading double 'cos it's got the wrong speedo drive in it. Reading erratically - for a number of reasons. Not doing anything as something is broken/disconnected. If you find out what, if anything, is amiss, please tell us what you find, this is an unusual one. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

18-01-11, 11:36 AM	#6
SVMAT Guest Posts: n/a	Re: Speedo Overread by about 10% Mine started reading much more accurately when i put a new front tyre on with a 70 profile rather than 60. So could be worn tyres or a slightly lower than standard profile.

18-01-11, 12:24 PM	#7
SUPERSTARDJ01 Guest Posts: n/a	Re: Speedo Overread by about 10% Mine was 11.5% out on my zx6 due to general over read and small front sprocket so had to get a speedo healer, works great. Check http://www.healtech-electronics.com/ here to see the % it should be over by. Last edited by SUPERSTARDJ01; 18-01-11 at 12:27 PM.

18-01-11, 03:23 PM	#8
Mej Member Mega Poster Join Date: Dec 2008 Posts: 1,418	Re: Speedo Overread by about 10% + 10% is normal on most bikes i reckon __________________

18-01-11, 04:27 PM	#10
Owenski Guest Posts: n/a	Re: Speedo Overread by about 10% Its been mentioned a few times that the SV generally overreads around 10% ps welcome to the org.

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