DESCRIPTION:

ADA Racing billet dome for Yamaha motors using 'flat top' pistons. Includes compression(OR043) and dome top(OR020) orings. Squish relief is .015 inch at 86mm with a 4 degree angle.

DESCRIPTION:

ADA Racing billet dome for Yamaha motors using 'flat top' pistons. Includes compression(OR043) and dome top(OR020) orings. Squish relief is .015 inch at 86mm with a 4 degree angle.