Motorcycle Cylinder Block STD 54mm 149cc For YZ125 2005-2021 YZ125X 2020-2022 1C3-11311-21-00 Engine Parts Material: Aluminium alloys & Ductile Iron OEM Code: 1C3-11311-21-00, 1C3-11311-00-00, 1C3-11311-01-00, 1C3-11311-10-00, 1C3-11311-20-00 Cylinder Bore: 54mm Weight: 1650g Color: Silver Fitment: For YZ125 2005-2021, YZ125X 2020-2022, YZ125G 2016 Upgrade your off-road motorcycle with this engineered cylinder block designed for YZ125 and YZ125X models.Constructed from a combination of aluminium alloys and ductile iron, the cylinder block offers and resistance to wear.The 54mm bore is machined to standard specifications, supporting consistent engine performance and.This unit serves as a direct replacement for , compatibility without modification.Its silver finish maintains a factory-like appearance while aiding in heat dissipation during extended use.Weighing 1650g, the design prioritizes minimal impact on overall bike handling.An instruction manual is included to support straightforward installation.Specifically tailored for the YZ125 series, this cylinder block fits multiple model years and configurations, including YZ125, YZ125X, and YZ125G variants.It provides a functional solution for engine rebuilds or performance , meeting the requirements of both routine maintenance and performance-oriented modifications.