Hello, right this video explains all that has happened.
I am looking for a replacement engine however is it an easy enough move to replace with a 600 engine?

Have just been looking around and i've found that the CBR600 engine between 1986 and 1992 ( i think ) Jellymould Models fit the frame.

The only adjusts that have to be made are the straps on the head need to be moved and mig welded back in place.

I've just found this engine, CBR600 F that fits in the year range and looks identical to my engine (although cant be sure) and was taken out of a CB1 400, and again after a little looking looks very simular in the frame.

Would this be an ideal replacement

Would any adjustments need to be changed to loom?
Is it a stright fit and then just adjust the top head mounts?
I guess i would need the CDI, and can this just plug stright into the loom?

Anyone with experence on this who could shed some light would be awesome, thanks.

HONDA CBR600 CBR600F FG-FJ 87-90 ENGINE motor broom broom | eBay