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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: 313green on November 03, 2016, 10:25:43 AM
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I made a total noob move and ordered the wrong speedometer for my '85 K100. The shop guys installed it and it works great with the lights, etc but it's a mechanical drive. I have no idea why the shop didnt call me but that's besides the point. It's all installed except the speedo/odo. So... is there a mechanical option? Any suggestions appreciated or I need to buy the digital speedo and start over.. ugh
Here's what I ordered and is installed...
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Pictures pictures... I know.
Here's close to the final product.
Here I am experimenting with battery cover ideas... looking for suggestions.
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Just about anything is possible, but in your case you would have to find a front wheel with a compatible speedo drive and disc brakes. You would also have to get the correct speedo gearing. And if that's not enough you would also probably have to change the calipers and caliper mounting points and front axle. I would probably just sell the speedo, and your old original speedo which are in demand especially if it is working, and get a digital one, check the posts there is a lot of information on aftermarket speedos.
Regards Martin.
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Thank you. I think I'll be going with the digital speedo. Much appreciated.
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Yeh,start again.
One thing no one seems to consider is mounting a GPS with speed function as a primary speedometer.Mine's super accurate.It even tells me when I'm speeding and alerts me to any speed cameras!Maybe,I'm missing something?Oh,tunnels!
Sadly,it does have a "Can't get lost"function which I find boring. :hehehe
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GPS speedo works great when you have a clear view to the south to catch the satellite signals. Doesn't work very well at all when you don't have that view, such as in a tunnel, forested area, mountainous region and so on. This is second hand info from a guy I know.
As for the mechanical speedo, if you or someone you know is handy with electronics, you might be able to rig up a stepper motor driven by a hall effect sensor on the wheel. The rotation of the wheel would produce pulses that would be read by a computer and output as instructions to the stepper to spin. The stepper could be connected to the mechanical input on the speedo. Actually, just replace the speedo and chock up the loss to experience gained.
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Rbm,I indeed happen to have the best view South here in New Zealand!It's just tunnels that blow it away.Must be spoiled which I didn't realise.No odo function but for a bit of maths!
Did a lot of design work with stepper motors on an old flexographic printing press.Changed them for servos in the end.
313,Yep,Keep things simple!Go back to monitoring pulse rate with an electronic job,like a push bike one,even.