I don't have a brand opinion but for best results (talk to Ron first for pointers) if you decide to use a new piston install your new piston (without rings) to measure your current squish as Ron will want that info when you send your head to him. New piston may differ from the old one. That way when you get the head back it matches the new piston.
I'm using Athena in mine and we put a Vertex in my kids. Budweiser vs Miller as far as I'm concerned.
Mine was an "A" cylinder and I put in a "B" piston when I did it per Jim Cook.
The kids was replated to "A" size by Millenium and that's also the piston we used for his.
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jeff
'00 XC250 (mine)
LTS front and rear suspension, power valve cover, carb jet kit and rear chain glide, RB Designs head mod, BRP tall triple clamp, backyard foot-peg lowering conversion.
'04 EC250 (the kids)
(he can do his own mods haha!)
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