Thinnest point.
When I had RBD do mine seems He asked that I use a 2" piece hollow core solder directly across the top of the piston under the hole for the spark plug. The result showed the untouched part where the plug would have been (leave it out to do this) and the tightest area is around the plug hole. The head is then machined accordingly to match the squish desired while keeping the same shape as the piston dome.
Kudos to RBD. He did a great job at a good price and turn-around was quick. Very noticeable results on my bike. We haven't done my kids bike.
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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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