Athena Top-End Gasket Kit 09341768 for Beta ARK50AC QUADRA 50 TEMPO50 Yamaha CS50AC CS50LC YA50 YA50R YH50 YM50 YN50 YN50F YN50R

Athena top-end gasket kit to fit Beta ARK50AC (1997–1999, 2001–2008); Beta QUADRA 50 (1997–1999); Beta TEMPO50 (1994–1999); Yamaha CS50AC (2002–2011); Yamaha CS50LC (2002–2011); Yamaha YA50 (1995); Yamaha YA50R (1996); Yamaha YH50 (1999–2006); Yamaha YM50 (1994–1995); Yamaha YN50 (1997–2001); Yamaha YN50F (2009–2015); Yamaha YN50R (2002–2015).

This kit contains the necessary seals for a top-end refresh or piston change. It sits at the heart of your engine's combustion cycle, covering the cylinder head, base, and exhaust port. You also get valve stem seals and required O-rings for the cooling circuit. These parts need replacing every time you remove the head to maintain compression and prevent coolant migration. The fitment is model-specific to ensure exact port alignment and bore clearance. Always check your torque settings during reassembly to avoid crushing the head gasket unevenly. It is a vital requirement for scheduled top-end maintenance.