Motorcycle Engine Seal ZX7R 1996-2003 Standard Size Works for Fit For ZX-7R Ninja ZX7R 1996-2003 sport bike engine with 73mm cylinder bore piston groove size cylinder inner diameter no extra machining or needed Suppresses engine blowby reduces oil consumption maintains stable compression during RPM riding tensile material anti abrasion for Standard ring width opening clearance consistent with piston ring specifications