Wow that's a tough class!
I'm focused on learning to ride that's why I choose cool and not so fast bike.
Shock is SC59 CBR1000rr - it has got lower (150NM) spring compared to 180NM original one and it feels soft on rear but going back to my experience, I think I'll not complain on bike rather on my skills on my first ride on track. Which is this Thursday.
What's with the engines :)? they are pretty cheap here in Poland only IF VF500 Magna are the same engines. Because VF 500 F2 are a rare!
Cheers!