Building a RX1 motor

[summitrider1]

i am thinking of building my RX1 motor in the summer and was wondering what internals you guys are using. i am thinkin of going je pistons, carrillo rods. what else would i need? do you guys upgrade the head bolts? will i need new valve springs? with the RX1 motor how much boost will it take reliably?
Thanks

 

[sledfvr]

JE pistons with stock yammi rings, carrillo rods, and APE headstuds for an R1 bike(because they are less than $80). That's what I'd do knowing what I know now. I've never had any problems with the stock valve springs.

 

[summitrider1]

do i want 10-1 or 9-1 pistons?

 

[red]

9 to 1, then you can use 1 stock yami head gasket.