[Ferhuagarz]

Since i bought my CRF250X i've had endless problems with my dash, first the backlight blew and now my speedo reads 400km/h. I recently got it ready for rego. got it all done and once i rode it out of the mechanics my speedo jumped to 400km/h (roughly 40km/h). i was wondering if anyone else has experienced this problem before and has fixed it too... i have the stock standard Australian speedo on, no fancy trickery done to it.

[JimDirt]

Welcome to the site !!

Could it be that the backup battery inside is going bad ?? , are any of the other readings doing weird things??

It could also be a issue with the cable to the wheel sensor , or the wheel sensor itself , i am assuming there is a setting for wheel diameter to set your Speed , check thru those settings and make sure they are what they should be , it should be something like 2110mm , your actual reading might be different depending on the physical measurement of the wheel circumference , multiply that number by 3.14 , you will come up with a number like 2197 or so , enter that into the the settings , and it should be good , if it does not hold that number over time , then i would replace the memory backup battery (its usually like a flat Watch Battery)

But it will either be in the wheel sensor itself , or the cable going to it , or the backup battery (the battery used for memory/settings storage) , from what i understand , people have a lot of issues with them after a few years , and just end up replacing them with a Trail Tech unit , or equivalent , we don't have them on our U.S. bikes , all ours have is a mechanical (speedo cable)trip meter that only goes to 99.9 miles and resets to Zero , but with no actual speedometer , as our X's are not street legal from the factory , only the CRF250L and the XR650L are street legal here

You might also check with Ray , as he is from your part of the world and he might have some better insight than i would , PM him , and see if he can give you some better ideas than i did (look for the red PM in the link below and click on it and you can send him a Private Message , hopefully he will reply quickly , as he is on here almost as much as i am)

http://www.crfsonly.com/forum/profile.p ... 07dbeb8153


Hope that helped some....

[Ferhuagarz]

Thank you for replying!
sorry for the late reply, school work is piling up
Would you happen to know where the backup battery is? There is no info online about it. thank you!

[JimDirt]

If its a Digital unit , then it should be on the back somewhere , there should be a sliding cover or a screw on cover , or the whole back unscrews , i would not think they would rely on the main bike battery for its only source of power , none of the aftermarket ones do , they all have a internal battery to save settings and keep the mileage memory , so i would guess that the stock unit would as well , it will most likely be a flat round watch battery

Again , PM Ray , as he should be familiar with those units as he is a Aussie , so if anyone here would know , it would be him ...

[Ferhuagarz]

Thank you heaps for helping me! I've PM'd Ray and still waiting for a response. thank you for helping me with this.

[Aussiecrf230]

PM sent.
Assume this is the unit with the sensor lead going to rear wheel.
Post up some pictures for what you have.
Pretty sure they stayed the same from 2008.
Sorting these electronic things is a bit hard without the bike in front of you.
It is a bit like "what is this noise".
This is why the pictures come in handy so we all know what parts we are dealing with.

Was it ten times the speed over a range of speeds or just around 40 Km/hr?

[Aussiecrf230]

Actually see if you can see manufacturers name/logo, I am pretty sure the were the English Acewell's by then. I have a set up manual for some of the models.

[Ferhuagarz]

the speedo told me i was doing 400km/h while i was doing 40km/h however the speedo wouldn't go any higher so it made it problematic. But it worked as normal but read the speeds too high, when i put it in to get registered it was working as normal but when i got it back it was doing that. I'm unable to upload photos for some reason and i cant find a photo online to send a link to. can you think of any more ideas?

[Ferhuagarz]

the manufacturers aren't stated, the only brand on it is Honda.

[JimDirt]

To upload a photo , you need a Hosting site , like Photobucket , , when you have a Hosting site , it will give you links for Forums , etc , you just click on the link (in Photobucket's case) , to the right of the image you upload , is various links , you choose one , and just paste it into your post , it will look like text , but if you have the correct link for these forums (IMG) it will show up as the actual picture when you Preview it , if its good , then just click Submit

It will look like this in your post

[ IMG]http://i825.photobucket.com/albums/zz174/JimDirts/DSCF5157.jpg[/IMG]

But show up like this

[Aussiecrf230]

as per PM

Look on this site
http://www.s3performance.com.au/brand/Acewell

Just image it with Honda logo.

Think it is 31XX series of speedos. Make sure airgap is about 1mm and lead not damaged. Make sure magnet still on bolt head if that type.
Make sure there is no dirt build up around it.

Check connectors and grounds as sounds like electrical noise. Someone didn't pressure wash the bike when doing road worthy?

Any other Aussies please chime in when you identify it as it is handy for others to know.

Let us know how you go.