Engine Rebuild

[coxygg300]

hi guys

im currently on with stripping down a 2010 gasgas ec300 six day that is in need of a new set of main bearings. i have a couple of questions that i would like answering before i have a go at it and these are;

1. What parts except from mains bearings and seals will i require? (any o rings or other parts that i am unaware of?)
2. is there any tips or things i need to be aware of such as washers or springs falling out etc when i take the bike apart?
3. does anybody know the codes for the main bearings and seals so i can see if i can source these from a local bearing shop?
4. does anybody have any instructions on the method of taking one of these apart that i can follow or is it quite a simple task?

Cheers
Darren