Front wheel speed sensor...

[MeXeverus]

Hi, my current dual sport motorcycle has a digital speedometer/odometer and tach, with analog fuel gauge.



The speedometer doesnt work anymore. I tried replacing de wheel speed sensor, which is very rare, and ended getting one very similar. I installed it, but only registers half speed (aproximately when going 80 km/h new sensor shows 40 km/h)



Been reading a little, and discovered my old sensor had 4 magnetic elements, versus 2 of the new one. It had small spaces, so since the old rotor does not fit with the new casing, i teared it, removing 2 magnets, and put them in a cross pattern.


Didnt work, heck, even the speed was reduced to half again (now registers 20 km/h when going 80 km/h )


I am not very knowledgeable with physics ,so i was thinking it i put the magnets in "wrong polarity" (so they are behaving like a 1 big wheel element, hence the speed divided by 4) if that can be achieved or if the magnets are weak and they are faulty in first place.


What i can do ?


I attached pics of my current cluster and the works of the tone ring


Sorry for my english, its not my primary language.


Thanks in advance