All Yamaha motored style speed magnet hub mod

[Jaspy]

Hey guys here is the mod that is required for a Yamaha axle speed sensor magnet with a center lock rotor to work with a six bolt rotor hub set up.

I have tested this mod for a few months now without a single problem. Without getting wordy hopefully the pictures will speak for themselves.

The magnet housing is composed of a two piece system that captures the magnet within. One side of the housing is held solidly by a notch in the frame and the other side slides into the centre lock hub nut via the plastic male splines. So the hub side spins while the frame side just sits there.
In a nut shell you are simply modifying the rotor hub nut to slip into your new six bolt hub rotor .

The above stock nut is modified using a die grinder to allow the nut to sit flush against the rotor surface.

Depending on your disc/rotor you may have to grind some of the threads off so the overall diameter of the nut is small enough to slip inside the disc.

Once you have the diameter right ( not critical size as long as it slips in) now check to see if the length of the nut bottoms out or not. You can either observe this by touch or use a set of calipers to measure the thickness of your disc then the length of the bolt. I upgraded to a six bolt 203 Magura disc with DT Swiss 350 Hybrid 6-bolt disc hubs, 32h, black. Boost spacing, HG freehub. With this set up I had to slightly grind the threads and the overall length very slightly.

As you can see the nut is prevented from seating properly because of the six bolt heads. Shown here with the speed magnet c/w housing attached

Here is the modified nut in place with the magnet housing seated properly and working excellent !! No more junky hubs n wheels !

Here is the new wheel set up with new six bolt discs and wheels. The wheels were made by Mike Curiak at lacemine29.com
I am very impressed with his talented skills and highly recommend him. DT Swiss 350 Hybrid 6-bolt disc hubs, 32h, black. Boost spacing, HG freehub.
RaceFace ARC Offset 40 27.5+ rims, 32h, black.
DT Swiss Competition butted spokes, black.
DT Swiss Prolock nips, black.

 

[Jackware]

Mike's been posting on the MTBR forum for years and is well respected there, he also blogs, with stunning pics, about his and his wife's various cycling adventures.

Big Wheel Building

lacemine29.blogspot.com

 

[Velofrog]

Anybody have the pics for this mod as they're not showing for me....

Cheers!

 

[Jackware]

Try here;

Need to choose hub compatible with Civante speed sensor

Hey I realize this an older thread but I have done a mod that will allow any hub to work with the stock magnet set up. I have DT Swiss hubs with 6bolt rotors now. So it’s a fairly easy mod. Let me know if you need the details. Cheers 🍻

forums.electricbikereview.com

 

[Velofrog]

You sir are a star!
Just by checking an old centre lock nut against my hope wheel I guessed that's how it worked, its just sitting there not screwed in or held in any way, that's the only bit that was confusing me!
I'm awaiting delivery of a Yamaha Moro 07 and have a SRAM AXS groupset I want to fit on my hope wheels when it arrives, this seemed to be the only issue with that!
Thanks for replying, it's appreciated!

 

[Rickster]

Hey guys I have also done this mod in the past and find that a notch milled out of the axle spacer isn't necessary as another poster mentioned. The sensor slides on without issues. The groove in the OEM spacer is not needed at all , at least on DT Swiss hubs. If you can slide the magnet assembly on the spacer you're good to go !