The screw next to the flower nut is turning but it won't come out.

[Frankenstein]

No I don't, but I have a feeling it's the same as the magneto mounting screws. Pull one out and see if it threads in.

 

[Nahom]

Sure I'll give that a go

 

[Greg73]

it is supposed to be an m4, you might want to get a tap and retap the threads on the clutch plate before running a new one in, seems that the manufacturing is sloppy on these, go figure. If you have an ace hardware near you they are a good source for metric fasteners etc.

 

[FurryOnTheInside]

I think it's M4
Ooh and it's magnetic!

Here it is against a M5 disc rotor bolt

Post edited due to misleading information!

 

[Frankenstein]

There you go! Go hunting for m3!

 

[Frankenstein]

Wait the one on the left is the screw?

 

[FurryOnTheInside]

Wait the one on the left is the screw?

In my picture, yes. Magnetic Phillips head screw that definitely came from the clutch on my HT generic. The black one is a brake rotor bolt

 

[Frankenstein]

In my picture, yes. Magnetic Phillips head screw that definitely came from the clutch on my HT generic. The black one is a brake rotor bolt

3.93 mm is a 5/32 inch. It looks like your caliper is off by a mm lol

 

[FurryOnTheInside]

3.93 mm is a 5/32 inch. It looks like your caliper is off by a mm lol

But that's outside of the thread. I'll check again.
Yes your right Frank. I'm used to naming bolts by the allen key that fits them and not by the measurements of the thread itself. Years of habit and i must apologise.
M4 allen head brake rotor bolt measures at 4.94ish, outside the thread, which must mean it's an M5 thread.
So the clutch plate flower nut locking screw is an M4.

 

[Nahom]

I used a 2mm drill bit drilled right into the middle of cross head- wasnt going any further- I pushed in with the hammer drill- but just refused to budge. Eventually the drill bit snapped right off
I was wondering if I could somehow hold that screw from turning while I drilled by holding with screw pliers- but I realised if that was to work and head was big enough for the pliers to hold on to then I wouldn't need to drill in the first place. I don't want to waste more drill bits by experimenting on my own- any advice to prevent further sadness?