Speedo Woes

[RantMachine]

Right, I've mentioned my dodgy speedo before but never gone into detail. Would be a dream come true to have it sorted in time for the rally, so here's hoping...

In short, I have no idea what my speedo is doing at the moment. It's giving a reading, and the fault is consistent. But the reading is always too high, as far as I've noticed it's ~15mph out at lower speeds at ~10mph out at higher speeds. It sometimes give a reading around 15mph when idle, too - not a stable one, kinda bounces up and down between 10 and 20. Rolling it forward a bit tends to get it to sit back at 0. Equally, if it's stationary and a 0, rolling it forwards a bit will usually make the dodgy readings kick in.

And naturally I don't have the faintest idea where to look first! If the other repairs hadn't cleared me out I'd probably start buying parts from a breakers and replacing potential culprits one by one, but random trial and error is perhaps not the best approach for a man so far in the red...

Has anyone encountered this problem? Or does anyone have a suggestion on where to start?

[littlecat]

I'd start with the speedo cable... obvious and cheap

[Stu]

Been a BMW I reckon it will be electronic cat

But confirmation will be needed ollie

If it is electronic it sounds like it's getting some sort of electronic pulse to the speedo

I would be looking at all connections to make sure there isn't any shorts or water hiding any where or corrosion

[Adam]

Yeah start with speedo cable, that solved the problem on my NSR and cost £7. For the WR I've ordered a new speedo cable as well but it's yet to arrive so hopefully that works cost me £26.99 :'(

[acting_strange]

Right, I've mentioned my dodgy speedo before but never gone into detail. Would be a dream come true to have it sorted in time for the rally, so here's hoping...

In short, I have no idea what my speedo is doing at the moment. It's giving a reading, and the fault is consistent. But the reading is always too high, as far as I've noticed it's ~15mph out at lower speeds at ~10mph out at higher speeds. It sometimes give a reading around 15mph when idle, too - not a stable one, kinda bounces up and down between 10 and 20. Rolling it forward a bit tends to get it to sit back at 0. Equally, if it's stationary and a 0, rolling it forwards a bit will usually make the dodgy readings kick in.

And naturally I don't have the faintest idea where to look first! If the other repairs hadn't cleared me out I'd probably start buying parts from a breakers and replacing potential culprits one by one, but random trial and error is perhaps not the best approach for a man so far in the red...

Has anyone encountered this problem? Or does anyone have a suggestion on where to start?

 

http://www.f650.co.uk/forums/tags.php?tag=speedo

http://www.ukgser.com/forums/showthread ... ot-working

http://faq.f650.com/GSFAQs/SpeedoABSSensorFAQ.htm

[RantMachine]

Yep, it's an electronic one. I think the cost for a used part from Motorworks was about £50, something like that. Looking at the various connections is... A bit of a headache. All of the wires are wrapped together in some horrible stringy black tape, makes it hard to work out what the hell is going on inside there - especially when I already don't know the first thing about electronics

[RantMachine]

Thanks for the links Derek, have given them a read through. Already a member of the f650 forum, but hadn't seen a couple of those threads - some sound kinda similar, which makes a change. Most of the stuff I've read was for speedos giving low or no reading.

Guess it's gonna have to be a new speedo sensor as the first point of call. Will order one tomorrow, and try to brave the mess of wires on my days off next week...