Is the pink spring difficult to install? Are there any special tools needed. Any tips?

 

I think the main bolt is 20mm. You have to hold the clutch still to remove it (reverse threaded) so you need something to brace it, unless you have an impact wrench. It should only take 15min to remove and 15 min to intsall. The clutch cover is easy to remove. After that you're looking at 8 little bolts and 1 large one in the middle.