New clutch not working at all!

[Bretty]

To be honest, rightly or wrongly (yeah yeah, I know wrongly).. any steel Allen key bolt screwed in to aluminium, I always loosen with an impact driver. Like a screwdriver that turns when you hit it with a hammer. I just put an Allen key socket on the end and tap out. Any screws in a dissimilar material or subject to thermal variation will fuse/corrode in. The impact driver never rounds heads and will get any screw moving.

Screws can be a nightmare to get out once rounded, always start with dremel, either disc cut a slot and wind out with a screwdriver, or engrave a dimple, the drill out with progressively larger size drill bits. small bits.