YCP pistons are made from a more strong cast (AC8a Grade)
Teflon coating to provide smoother running, increased piston life, improve cylinder sealing for less blow by and more power, reduce friction.Dual oil holes to provide better Wrist Pin Lubrication.
Help prevent damage from inadequate lubrication, Especially during cold start-ups.
T-6 Heat treated for even greater strength.
Whereas previously Riken Corporation and Nippon Piston Ring Co., Ltd. (NPR) were subsidiaries of NPR-RIKEN, in April 2026, corporate split procedures were implemented to transfer their sales, development, and corporate divisions to NPR-RIKEN. As a result, NPR-RIKEN became an “operating holding company.”
Since the business merger in October 2023, we have been advancing substantive integration through establishing divisions for overseeing the subsidiaries and subcommittee for integration. However, with this transfer of operations, full-scale integration are now implemented at the business line level as well.