New Bike, Seized Engine, CCT?

[bald_pig]

I'm guessing you haven't got the under seat toolkit, should be a socket for the plug in there.

[mightyscotspine]

I'm guessing you haven't got the under seat toolkit, should be a socket for the plug in there.

The socket is missing sadly. No surprise there!

[mightyscotspine]

Ok, Teng 18mm turned up today.. turned engine over with plugs out, it goes fine for a bit then locks. Sounds like it is the rear part of the engine, I'm wondering if it's dropped a valve and that is the sound? It won't turn past that point no matter what. I haven't forced it for obvious reasons!
Anyone got any idea?
If it is a dropped valve is there a guide on here anywhere of how to open up the head and fix it? I don't mind having a go, just don't want to f it up because I don't know the best practice..

ta..