PISTON KIT 82-83 YZ490 88.50mm, WISECO 478M08850

Part No. 56-W478+1.50.WI (oro2u.com)
Yamaha IT490 (1983-1984), Yamaha YZ490 (1982-1983),
Wiseco 478M08850 Piston Kit 88.50mm.
Extreme racing conditions demand the strength and toughness that only forged pistons can offer. Compared to cast

pistons, forgings are tougher and more durable, and will stand up to the abuse that high performance motorsport applications require. Most castings are brittle, have no grain structure and tend to fail catastrophically when the material yield strength is exceeded. Forgings have condensed grain that is aligned to the features of the part, which produces higher mechanical properties, and resistance to impact and fatigue. Each forging is designed to optimize the strength-to-w 56-W478+2.00.WI" kits and related items Top-End bearing available-part no. B1014
Included Items: One 89.0mm piston Two 3504TD rings Two CW18 circlips One S277 wrist pin