Speedo Calibration

[slofox]

I would like to know how accurate (actually how INaccurate) the speedo on my bike is. viz. 2007 SV650S - digital speedo. :blank:
Live in Hamilton. Have been waiting for a speed cart to appear (y'know those trailer mounted thingies) or a co-operative copper (oxymoron?) with a radar gun, but no luck so far. (Where's the coppers when ya need 'em eh? I bet if I blasted down Cobham Drive at full speed they'd appear quick enough...) :Police:
Speedo Shop cant do digitals.
Apart from measuring time over a measured km (there's one is Massey St), does anyone have any bright ideas for me that don't involve trying to time myself with a stopwatch whilst riding one handed at a steady speed for a km down an urban street.....?
All suggestions fully considered before being ignored.....:rolleyes:

[nodrog]

get a friend with a gps

[Warr]

I have a GPS and does just the business when you are trying to figure out speedo inaccuracies. Usually have it with me on a ride...
Oh I also live in Hams too :)

[slofox]

get a friend with a gps

errrrrr "get a friend"...what is this thing you call friend? Let alone one who owns a GPS......

Seriously though, I did think of that but don't know anyone with the requisite equipment........

Thanks for the reply

[nodrog]

errrrrr "get a friend"...what is this thing you call friend? Let alone one who owns a GPS......

Seriously though, I did think of that but don't know anyone with the requisite equipment........

Thanks for the reply

that guy 2 posts up wants to be your friend, be nice to him and share your play lunch.

[Warr]

that guy 2 posts up wants to be your friend, be nice to him and share your play lunch.
Contact made .. We're waiting for a weather friendly Sunday now :)

[slofox]

Contact made .. We're waiting for a weather friendly Sunday now :)

Wot he said........all done!

[Owl]

Yeah I'd like to check mine for accuracy. At least I'm able to re-calibrate mine, but I need to know how far it's out first. I might have to find a GPS.:yes:

[slofox]

Well this morning I set out to time myself over the measured km in Massey Street. Lo and behold, who should be out there but the LEO's...:Police:.....complete with radar gun. :ar15:
I pulled over and politely asked the man with the gun if he would be so kind as to ping me with it - he was more than happy to oblige. So back I went up the street and approached at supposedly 50km/hr although I had it on 49....:scooter:....his reading was 47km/hr....so the speedo is MUCH more accurate than I had thought - just goes ta show, ya can't believe everything you read on the internet - I have seen claims that SV speedos over read by 10%....just as well I didn't take that as gospel else the LEO might have gotten a more serious reading than he did. :Oops:
Anyway, a bouquet :clap: for those men in blue who were so helpful. (Now that's rare isn't it?)

[fatzx10r]

speed past a cop, then pull over and find out :Police:

[slofox]

speed past a cop, then pull over and find out :Police:

Under the circumstances I thought it better to just pootle past him......no sense in getting him to focus on me and then blasting past with 180 on the clock...although the thought DID cross my mind.....hehehehehe

[wysper]

Yeah I'd like to check mine for accuracy. At least I'm able to re-calibrate mine, but I need to know how far it's out first. I might have to find a GPS.:yes:

Is it a difficult process to recalibrate a speedo?
Will I need the service manual of the bike?

cheers

[vifferman]

Your test with the cop still indicates a potential error of anything up to 5 or 6%.
Wysper: unless you can find somewhere that can adjust your speedo, the easiest (and in any case, the cheapest) option - assuming you don't wish to change the gearing on your bike to match the speedo, and that you have an electronic speedo - is to buy a speedo corrector kit from Jaycar Electronics.
Speedos are usually (and deliberately) optomistic, whereas the odometer is usually pretty much correct.

[nodrog]

Is it a difficult process to recalibrate a speedo?
Will I need the service manual of the bike?

cheers

its easy for ferris, because i belive he will have a tuneboy (http://www.tuneboy.com.au/) which will allow him to change the parameters within the factory ecu.

another way to do it is get a speedo healer (http://www.speedohealer.com/eng/faq.htm)

[firefighter]

Under the circumstances I thought it better to just pootle past him......no sense in getting him to focus on me and then blasting past with 180 on the clock...although the thought DID cross my mind.....hehehehehe

hahahahaha, that would be fucken hilarious actually, imagine the look on his face when you come absolutely screaming past! hahaha, maybe something i'll do if i ever hit the jackpot and can afford to lose my licence and bike lol

[wysper]

Thanks Vifferman and Nodrog

It is not a digital speedo unfortunately. Looks like there might be someone in Ham that can do speedo calibration. Better make sure the tires are the right size!! That can mess things up too.

[nodrog]

Thanks Vifferman and Nodrog

It is not a digital speedo unfortunately. Looks like there might be someone in Ham that can do speedo calibration. Better make sure the tires are the right size!! That can mess things up too.

even though it may not have a digital display, it may still use an electronic signal from the gearbox. or is it run via a cable off a hub on the front axle?

[Morcs]

www.speedohealer.com

just got mine. Its awesome. 5 mins to fit and calibrate. Use the online calculator. Also has a top speed recall button, pretty cool.

[wysper]

even though it may not have a digital display, it may still use an electronic signal from the gearbox. or is it run via a cable off a hub on the front axle?

Yes, there is a cable running off the front axle.