pics
Hi again, i've done some pics with a spare unit, the first one is of the GSAP unit in place with a line to the single retaining bolt, this is an encapsulated bolt but i have reused with loctite without any issues, just be very careful when retightening that you don't shear, I always use micro torque wrenches when in doubt and always suggest people research their own value

When you unbolt this 8mm? bolt you will need to apply light wiggle pressure possibly with a small lever (plastic) to encourage it to disengage you can then either unbolt the cup joint or like i did unwind the link bar which seems easier (make sure you note the lever height), there is a small shaft spline bucket which goes between the shaft and the unit (sort of serrated cast iron small thimble with splnes in it) these are an easy thing to lose under the nearest garage unit and i have seen them broken as they are a brittle metal, but they are fine if you are looking for them and careful when removing/replacing (it may stick in place on either the unit or the shaft and can be missed) i haven't got a spare one to picture as i wasn't going to disturb mine.

this picture is of the unit with a feeler gauge in the gap, the unit is fully tightened up and this is a standard gap of about 15 thou on the unit not a defect, this is the gap that i fill with silicon to stop the ferrous debris getting in.

This one is the unit apart, as you can see all that is inside is a large spring which provides pressure on A the shaft (an easy test when parked is to push and pull the gear lever and ensure it rotates around the point B up and down, its not a big movement but about 5-7MM and easily spotted (both can get stuck with old grease/pressure washing) which can then prevent the magnet which is pictured above B towards the top of the unit as pictured, moving relative to the electrical sensor C when bolted in place (which then and only then causes the ecu trigger dependant on up or down requirements).

of note i have had people with bikes thinking that they haven't got the hang of it actually been sold bikes without the GSAP unit contrary to advert etc (main dealers!) despite having the advice from dealers that they are all like that just be positive! so check that first, if it hasn't got a unit it wont have GSAP.
final pic shows the strength of magnet holding a stanley blade without blinking so a few filings are easily retained!
hope this helps someone
Hi again, i've done some pics with a spare unit, the first one is of the GSAP unit in place with a line to the single retaining bolt, this is an encapsulated bolt but i have reused with loctite without any issues, just be very careful when retightening that you don't shear, I always use micro torque wrenches when in doubt and always suggest people research their own value

When you unbolt this 8mm? bolt you will need to apply light wiggle pressure possibly with a small lever (plastic) to encourage it to disengage you can then either unbolt the cup joint or like i did unwind the link bar which seems easier (make sure you note the lever height), there is a small shaft spline bucket which goes between the shaft and the unit (sort of serrated cast iron small thimble with splnes in it) these are an easy thing to lose under the nearest garage unit and i have seen them broken as they are a brittle metal, but they are fine if you are looking for them and careful when removing/replacing (it may stick in place on either the unit or the shaft and can be missed) i haven't got a spare one to picture as i wasn't going to disturb mine.

this picture is of the unit with a feeler gauge in the gap, the unit is fully tightened up and this is a standard gap of about 15 thou on the unit not a defect, this is the gap that i fill with silicon to stop the ferrous debris getting in.

This one is the unit apart, as you can see all that is inside is a large spring which provides pressure on A the shaft (an easy test when parked is to push and pull the gear lever and ensure it rotates around the point B up and down, its not a big movement but about 5-7MM and easily spotted (both can get stuck with old grease/pressure washing) which can then prevent the magnet which is pictured above B towards the top of the unit as pictured, moving relative to the electrical sensor C when bolted in place (which then and only then causes the ecu trigger dependant on up or down requirements).

of note i have had people with bikes thinking that they haven't got the hang of it actually been sold bikes without the GSAP unit contrary to advert etc (main dealers!) despite having the advice from dealers that they are all like that just be positive! so check that first, if it hasn't got a unit it wont have GSAP.
final pic shows the strength of magnet holding a stanley blade without blinking so a few filings are easily retained!
hope this helps someone


I’m hoping real oem will show the way.