hall effect sensor for swap??? need help

[TBone]

Epoxy alone is good enough.

[ricracer16]

Originally Posted by gjscott

The sensor is a Cherry GS100701 (Same part as the Digikey item) hall effect switch from a local distributor called Master Distributors (Santa Clara, CA) but they have distributors everywhere.

What size diameter did you buy your magnets and cups? I have an 07 Gsxr 750 frontend with stock brakes

[gjscott]

Originally Posted by wheet493

And you just used epoxy to hold them in

No, bolts. I'll make a drawing later and post it here to show you more precisely.

[GrahamB]

Epoxy holds aircraft together, it's strong if you use the right grade.

However kryptonite for epoxy is heat, so putting the magnets in the rotor buttons is not so great from that point of view. Then again, if the magnet is inside the button, the glue isn't under much stress.

I once ran a race weekend with my radiator filler neck attached only by Loctite high-temp epoxy, no problems...

PS: you can get good rare-earth magnets from cheap in-ear head-phones. I used some from free pair given to me on virgin airlines for the
speedo on my bicycle

[D'Ecosse]

Originally Posted by GrahamB

... you can get good rare-earth magnets from cheap in-ear head-phones. I used some from free pair given to me on virgin airlines for the speedo on my bicycle

Way to go 'green' Graham!

[ricracer16]

Originally Posted by gjscott

No, bolts. I'll make a drawing later and post it here to show you more precisely.

Did you get to make any of the drawings or how to pics? Also I think I counted 9 spots to place the magnates should I use all 9 or will that mess things up?

[gjscott]

Yes. Are you sure there's 9 ? not 8 ?

[D'Ecosse]

Originally Posted by gjscott

Yes. Are you sure there's 9 ? not 8 ?...

Yes, there are some rotors with 9 buttons

Also I think I counted 9 spots to place the magnates should I use all 9 or will that mess things up?

No, you cannot use 9 and get correct reading - and you should not use 8 of those 9 either as that extended 'space' will throw things off.
Your options are
1) to not use the the button locations and try to space equally at 45 deg intervals around the rotor at another mounting point;
2) use 9 and live with the speedo error - it will be about 12% fast over & above the already inherent factory 'fast' indication - probably about 20% over actual speed will be indicated.
3) use 9 (or 3!) and install a speed healer device - expensive, but probably best option.

[ricracer16]

Where can I buy a speed healer?

[drinkbrew]

Originally Posted by GrahamB

PS: you can get good rare-earth magnets from cheap in-ear head-phones. I used some from free pair given to me on virgin airlines for the
speedo on my bicycle

I realized I had a bunch of old name tags from work that had perfect 1/4" magnets on them after I already ordered some .