Billet dome for ADA Racing head shell for Kawasaki 650. Squish relief is .015 inch at 78mm with 9.5 degree angle. Includes OR042 compression oring and OR020 dome top oring. Domes are sold individually.
Stock head with the head gasket is 35cc. All compression readings are on a stock, non-ported cylinder, at sea level elevation. There is a 7-10lb compression loss per 1000ft increase in elevation. If you have a ported cylinder, then your compression will also be less, depending on how much the exhaust port opening duration was increased.