Hi everyone. I have an 09 850 with 500 hours . I am wondering if anyone has found a big bore kit that is nice and rideable, but gives noticeable improvement. I have a QSC kit for this an a Magnum chip. I see JE makes pistons for this. Has anyone tried these? How much will this give? Can you use someone’s else’s cam and head work with these? Any other mods y have done worth doing? Thanks in advance Terry