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1989-2025 Yamaha YZ125
DD7 door bearings are 28% wider than stock
shafts and valve guides
5mm or 11/32 of an inch
New and improved ski tower for added strength that is compatible with stock fork guards
Cometic Gasket C3270-EST EST Top End Gasket Kit - 96mm Bore seats-seat-accessories 1989-2025 Yamaha YZ125Includes valve stem seals. EST (Extreme Sealing Technology) gasket kits include embossed stainless steel head, base and rocker gaskets covered with a proprietary rubber material. Head gasket material allows heat to be drawn away from the combustion ring and dissipated evenly across the gasket surface to eliminate hot spots and gasket failure. Sets contain all the necessary gaskets, seals and O rings to rebuild the top end from the cylinder base
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