MCS Tappet Blocks

9 products — part of all Tappet Blocks

MCS tappet blocks for Harley-Davidson house the hydraulic or solid lifters that actuate your engine's valves, making them a fundamental component of the valve train on Big Twin models. Worn or damaged tappet blocks can cause noisy operation, lifter collapse and inconsistent valve timing — symptoms that worsen progressively if left unaddressed. MCS stocks tappet blocks across the Harley-Davidson engine range, from vintage Shovelhead and Evolution applications through to Twin Cam platforms, sourced to OEM dimensional tolerances for correct lifter fit and oil feed alignment. Replacing worn tappet blocks during an engine refresh restores quiet, consistent valve operation and protects the adjacent camshaft components from accelerated wear. Iron City Motorcycles, your authorised Harley-Davidson dealer in Leeds, stocks MCS tappet blocks as part of a broad engine components programme. Browse the full MCS Tappet Blocks range below.