If it's a gear tooth sensor it probably has the magnet inside the sensor.
This means that it will not detect other magnets and needs a magnetic material instead of the magnets.
Try putting a steel bolt in the holes instead of the magnets.

 

I guess i don't under stand this. Why would this only work with a ferrous material? there is a magnet inside the sensor because it attracts to bolts as well as the magnets in the rotor.

wouldn't the same sensor attract to magnets the same as any ferrous material? whats the differences...?

D'Ecosse - how many magnets will i need? what radius for accuracy? is there some kind of formula i can use for calculations?

Thanks!

 

Also, 5 magnets is not going to do it for you either unless you plan to use speedo healer device

 

you need 4 magnets at 90 deg - radius is immaterial, as long as spaced at 90's

You might to reverse the polarity to see if it might work
Also - what is your spacing?

Try just holding a magnet and flash it back & forth across the sensor face and you will be able to tell if going to work.

Did you get the wires connected correctly for power, ground & signal?

Brown - Orange/Red
Black - Pink
Blue - Black/White

 

So I have 5 magnets evenly spaced. I can always redrill...

I did wire the sensor correctly, I even tried swapping the VCC and output, and still nothing.

I tried flashing a magnet in front back and forth, both polarities, and still nothing.

I am not an electrical guy, is there a way I can check signal with a Multimeter? What would I be looking for? What setting?

 

Great info here guys. Even the questions helped me sort some stuff out in my head.

...and the pictures and parts links just put the cherry on top. (excellent modeling skills gjscott!)

Thanks to drinkbrew for suggesting this thread. (It's not what you know, it where you know to look for it.)

Once I get all the parts gathered and installed I'll come back and post pics!




Thanks again.
Sympul

 

good morning, i was wondering if anyone would be so kind as to post up a tutorial?

 

This thread has pretty much anything a tutorial could need, also check gjscotts signature he has a tutorial there too.

 

I found a pretty good walk through with pics when I did a Google Search:

http://www.gregoryli.com/2007/05/speedo-fix-for-gsx-r-front-end-swap.html

Not sure if you're looking for a Gen1 or a Gen2 tutorial, but this covers most of the basics. After reading the post on the link above, I figure I've got it 98% figured out.

Hope this helps!




Sympul

 

So what kind of sensor would i need in order to not need magnets? I have the Buell front wheel and there is no good place to put magnets on it that I can see. I have the speedo healer and want to pick up the 6 bolts holding the rotor on.

 

So what kind of sensor would i need in order to not need magnets? I have the Buell front wheel and there is no good place to put magnets on it that I can see. I have the speedo healer and want to pick up the 6 bolts holding the rotor on.

So put 6 magnets in the 6 bolts that you have and use the speedo healer to correct the difference.

 

My front GSXR rotors have 12 holes each. So I assume I can use 6 evenly spaced magnets as well with the speedo healer? BTW, these are 08-09 wheels on an 08-09 front end.

 

^^^ Don't believe that will work with OEM instrument - have you tried it?

 

I'll find out soon enough. My Vapor gauge should be here any day now and I'll hook up the sensor with the stock gauge first. Your thinking on why it's not going to work is what?

 

so what's everyone useing for a hall effect sensor? all the ones in the links are no longer stocked

 

Cherry GS100701

You can get them all over the place.

eg: http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_512401_-1

 

Can someone guide me to a supplier for the sensor bracket ? It seems that there was a forum member that used to supply them. Thanks! Dave

 

Nobody really makes them anymore mostly because it is a very easy thing yourself. It doesn't take much skill to bend a piece of metal (aluminum or steal) and drill a couple holes in it.

 

So, a question for those that have used the GSXR sensor:

Are magnets still needed? It's the SV's clock that needs 'em right?

Would be handy if someone could spare the time and make a tutorial thread for this part of the front end swap.

 

It has been covered many times in the fork swap guide, yes you will have to read a bit but it is all in there.

The GSXR sensor is the same as the hall effect sensor mod, you need magnets either way. Both sensors do the same thing, they read the magnets and tell the speedo how many times the wheel has turned.

 

This is what I did:

And there's a few pics included in the video to help.






Sympul
(pm me if you want a link to my build tread on another site)

 

Don't place the magnets close to the bots that hold the rotor. I made tha mistake intitially because I am have galffer 9 rivert rotors and I couldnt place them there. The steel bolts distorted the magnetic field and the speedo was way off. Now I have placed the magnets on the outer ring of the rotor and it works just fine despite the fact that the magnets are not evenly spaced

 

Is there any specific purpose of the cups from Lee Valley Hardware beyond just to hold the magnets?

I found another set of magnets that fit neatly on stepped portion of the rotor hole and I don't need to use the cups unless they serve anther purpose.

 

Out of curiosity, where did you find the magnets, and how do you plan to secure them?

 

no need to use the cups as long as you can somehow secure the magnets on the rotor. I only used epoxy glue and they are stuck fine. I was using just electrical tape for a couple of weeks before gluing them and they didn't come off even at 120mph.

 

I purchased the magnets from a guy from work. I will post photos when I get it all together.

I may be able to get them for you guys if anyone else is interested.

I thought I read somewhere that the cups were supposed to make the magnets stronger, but I'm not sure.

 

I thought I read somewhere that the cups were supposed to make the magnets stronger, but I'm not sure.

Yep, they do

 

Finally got around to mounting the speedo sensor on my fork swap. I used the cherry one everybody else using. I mounted it so it faces the space between the friction surface and the carrier. It picks up the rotor buttons as they pass just fine with no magnets. Pleasant surprise. Just throwing it out there in case anybody wondered.

 

Can you show a picture of where you mounted the sensor? Is your speedo accurate with the setup? Thx

 

I got a question regarding the sensor needed and magnets and referred it to this thread.
For those of you with 9 spokes who also want to correct the factory mis-calibration check out 12oclock labs' calibrator. I got one and it works great.
See here: speedo DRD
I figured I may as well create an endless loop.

 

Thanks for the picture.

But a healer is require properly to run your setup. Guess sensor with 8 magnets are more cost effective.

 

Healer is only required for 03 and 04. The 05+ don't need one.

 

So I've read through the thread and still haven't been able to find a clear speedo solution for the 08-09 gsxr front end on my 04 SV650s. I assume the easiest route is the hall effect sensor because it is the most popular. Just wire it in, make a bracket and go. My main concern arises with the magnets. I have 12 button 08-09 wheels. Just to confirm, should I use 4 magnets spaced 90 degrees apart? And if so, will I need a speedo healer as well?

 

I have the 08/09 front end with the hall effect sensor from Jameco and rare earth magnets ala Home Depot. Four magnets are spaced 90 degrees apart. Right now it's running about 10+ mph lower than the actual speed measured on a GPS.

I will try flipping the magnets to see if there is any change, but does anyone have any other ideas here? Last resort, speedo healer.

 

4 Magnets, spaced 90degrees apart, no healer needed.