Guides Inexpensive speedo sensor fix

leighz · Jun 27, 2014

well...it works

Into ear to ear grin figures too.

This is the one I installed:

E2A-M12KS04-WP-C1 2M | OMRON Industrial Automation

Which cost all of £1 + p&p. New old stock off fleabay. Have found them for £95 new elsewhere.

Set it in the old sensor housing with silicon. Wiring as per pistonbrokes original post - hats off to him. Currently using new bolts with a larger head at the moment but will try it with the original ones and see if they work at some point.

alwaduk · Jun 27, 2014

Any chance of a link to the fleabay item, i can't seem to find them anywhere

leighz · Jun 27, 2014

You won't mate - it was a one off. You just need a hall effect sensor the same spec as the one pistonbroke used - 12v DC Inductive NPN Normal Open 3 wire switching ~200Hz or above, and it needs to be ballpark the right physical size so it will fit. I was just looking for one with a recognised brand name as I was taking a guess that they go through more rigorous quality control than the cheap ones available direct from china on ebay.

proximity (switch,sensor) -(ribbon,iphone,car,case,cable,tag) | eBay

Just check the specs on the manufacturer website to be sure before you buy.

simifeltham · Feb 21, 2015

speedo fixed cheap!

I fixed my one this weekend

I'll add photos and video later

simifeltham · Feb 22, 2015

Th3Judderman · Feb 22, 2015

simifeltham said:

Can you post the details of what sensor you used etc? Cheers

simifeltham · Feb 22, 2015

same as pistonbroke mentioned on 1.st page from ebay for 3.70 , 10 days to arrive ,,lot of pix in my album as well

simifeltham · Feb 23, 2015

RSV MENACE said:
hi i bought 1 of these fitted and sort of works if im taking it easy upto 40mph its fine any faster or try to accelerate fast from stand still it jump all over the place iv changed the bolts so there flat and not domed in still the same a got it as close as pos without it touching any ideas im puzzled anyone els had this

my one is doing exactly the same thing did you solve this problem?

Fast Yellow · May 3, 2015

Hi just done the mod, using your link so same part & spec. Speedo works up to 50 mph and then goes to zero. Do you have any advice or idea what the problem may be?

Gray · May 3, 2015

Fast Yellow said:
Hi just done the mod, using your link so same part & spec. Speedo works up to 50 mph and then goes to zero. Do you have any advice or idea what the problem may be?

I can't understand why anyone would waste so much time and energy trying to fix a problem with components that were not designed for the specific purpose of being a speed sensor for a motorbike. I'm all for saving time and cash (where appropriate ) but considering that I have not seen any evidence that this "mod" actually works on any ape forum, I'm dumbfounded that so many are even attempting this. Apart from anything else the finished product looks bloody awful.
I also had a knackered speedo sensor cable and found a "new & unused old stock item" from a bike shop in Scotland for £72 fitted in 30 mins - job done. :done

However each to their own :dunno

Gray

simifeltham · May 3, 2015

my one does the same no proper reading over 50 , bought a ducati monster one, cut off the ducati connector ,connect the 3 pin aprilia mille one ,use some power to bend the ducati cable because that one is in different angle, job done ,works fine since then for £25 ..&#55357;&#56841;

Gray · May 3, 2015

simifeltham said:
my one does the same no proper reading over 50 , bought a ducati monster one, cut off the ducati connector ,connect the 3 pin aprilia mille one ,use some power to bend the ducati cable because that one is in different angle, job done ,works fine since then for £25 ..��

Please post a pic of the finished "mod"

Gray

simifeltham · May 4, 2015

View attachment 6338 View attachment 6339

simifeltham · May 4, 2015

even the color code of wires is the same on ducati speedo

simifeltham · May 4, 2015

Gray said:
Please post a pic of the finished "mod"

Gray

done mate

simifeltham · May 4, 2015

View attachment 6347 View attachment 6348 View attachment 6349

Gray · May 4, 2015

simifeltham said:
View attachment 6347 View attachment 6348 View attachment 6349

I take back some of my previous comments, the final appearance looks better than I expected. However it will be interesting to see how long it functions properly. If it was mine I would be concerned that I had introintroduced 2 areas of potential failure:
1 a "bent" sensor connector
2 a jointed cable

But I am a pessimist by nature, and I hope that all is well with the work you have done. :thumbup

Gray :cheers

echelon · Jun 23, 2015

View attachment 6424 View attachment 6425

Great piece of advice! DC 12-24V NPN 3-wire 2mm Approach Inductive Proximity Sensor Switch PR12-2-DN from ebay. I used the old mounting and drilled out the middle. Put stainless steel allen bolts in. The allen bolts have a bigger lump of metal at the end and not the big dip in the middle especially if you grind the bolts flat. It takes a bit of setting up to get the right distance which is very close, just pray there is no play in your back wheel bearing. A little bit of heat shrink to cover the threads to finish.

echelon · Jun 23, 2015

DC 12-24V NPN 3-wire 2mm Approach Inductive Proximity Sensor Switch PR12-2-DN | eBay

Pist'nbroke · Jan 25, 2018

I've had a few PMs regarding suitable sensors since the original link is long out of date.

The exact part isn't critical, but there are some parameters that need to be met for this application. Get yourself to eBay and search for "Inductive Proximity Sensor". Most will likely be from China, so filter those out unless you don't mind waiting a couple of weeks for delivery. You then need to look for these parameters:

Output: NPN NO (NPN normally open)
Operating Frequency: >200Hz (or 0.2kHz). This is not always specified, but is important for this application.
Diameter: 12mm. You can use a larger or smaller one if you can make a suitable sleeve to fit the hole in the caliper bracket.
Operating range ~5mm. The one I originally used only had about 2mm sensing range and was slightly fiddly to adjust due to the concave shape of the bolt heads, so I'd go for 3-5mm. Don't go for one with ridiculous range like 10mm as you'll probably find it won't switch off after the bolt head has passed underneath.

Something like this one should work fine, and is also pretty cheap. These parts are available in diameters from 8mm to 18mm diameter if you want to use an alternative mounting method.

I sadly sold my RSV to get a Benelli Tornado RS a few years back, but the sensor I fitted was still going strong last I heard of it.

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