I?m curious about the cylinder, not so much about the head. Is the S3 cylinder ported differently? I noticed they have it advertised as a race cylinder. I just slid one on my 2012 EC 300 Race. My original cylinder is still good. I just got this S3 cylinder as a big package deal and I was opening everything up anyway to check how all was wearing. I?ll be finishing up the build tomorrow, but I haven?t ridden the bike in almost a year, so I?m not sure if I would notice a real difference, or if I?ll just be caught up on the old power but feel like it?s more cause how long it?s been. Know what I mean?