RE: the hyper st PRO thread!
I also read alot of you use 600 or heavier shock oils with the pistons drilled, I currently run Mugen Seiki #400 with the pistons undrilled.
I find the suspension quite harsh it could be a bit more plush.
What oil should I run when I drill the pistons to 1,4 > Mugen #500, #600 or #700 ?