[44Dwarf]

Flywheel nut tight? if it loosens it can wiggle on the spline and rub the sensor.

 

[44Dwarf]

I stand corected. it does not read off the flywheel but a driven timming gear very close to the flywheel. It's been a few months since i had my fairings off and at that time i pulled my pick up to check for swarf as i had the fairings off.
Soyour rub must have happened by some other means.

 

[44Dwarf]

got a "Sharpie marker" handy? coat the end install the pick up turn motor over (don't start it) remove pick up if the sharpies rubed off your to close if not pull a shim and retry. add one shim after rub is found. Or with no shims pus in the pick up and see if your feelers will fit under the mounting bolt area say you fit a 0.1mm under the hold down tab so you need to add a 0.5mm shim and a 0.2mm shim to get to clearance spec of 0.6 - 0.8 make sure you at the proper spot on the gear if trying it this way.

 

[44Dwarf]

I found this set while on the high side $$ wise. Seems to work well on my ST4 However I've not tried it in the pick up window.
Added plus is it's made locally to me, so in a way I keep friends working.

McMaster-Carr

your welcome to ride up and use'm