Original Yamaha Base Gasket For Sniper 155 V3-V4 (BOT-E1351-00)

A base gasket for the Yamaha Sniper 155 is a thin flat seal that sits at the bottom of the engine's cylinder block where it meets the crankcase.What It DoesSeals fluids: Keeps engine oil and coolant from leaking out of the lower joint of the cylinder.Sets clearance: Adjusts the height of the cylinder block, which controls the compression space (squish) above the piston.When It Is ReplacedDuring engine rebuilds: Swapped out whenever the cylinder block or piston is removed or serviced.To fix oil leaks: Replaced if oil begins seeping from the bottom of the engine block.