It's quite simple to mount on your rear sprocket, the magnet just needs to pass by the pickup sensor each revolution. The down side is if you want to use it measuring distance traveled wheel spin will record incorrect distance. I've used a BMX bicycle setup since '90 xr500 hybrid and just refurbished it. The magnet is held on with double sided tape (see attachment). Yes IK the Trail-Tec sensor is different looking, but I also have one of there sensor's mounted on my quad front wheel brake disc.
’84 YT60
’85 350x (423cc) with ’81 XL500 head conversion
’83 XR500 (628cc) converted 3 Wheel hybrid
’73 CB750 K3 converted 3 Wheel hybrid
’86 TRX250R chassis XR650L engine hybrid
’89 TRX250R (stock )
’90 LT500 Quadzilla
’85 FL350 Odysses ( water cooled head )
Lost (sold) but not forgotten ’80 ATC 110 (205cc on alcohol ) ’83 200x ( 222cc ) ’83 200x ( 185s eng ) ’85 350x ( stock )
added to the collection recently, (2) '70 US90 Aquarius Blue and '74 ATC90 Daytona Orange