A "tappet" is a small, mechanical component found in engines. It helps to regulate the movement of other parts, such as valves or pistons, by transmitting the motion from a rotating camshaft. Full definition
It also believed to feature individual ignition coils for each cylinder, spark plugs centralised in the combustion chamber and hydraulic tappets with rotor arms. (autocarindia.com)
Credit for this longevity goes to long - wearing platinum - tipped spark plugs, a long - life timing chain, and careful engineering of the precisely manufactured DOHC valvetrain - which reliably maintains proper valve tappet clearances until the first tune - up. (hondanews.com)
Fully revised high - speed valve train with modified camshafts, adapted cam geometry and optimized bucket tappets featuring a special coating that is typically used on race vehicles - Modification of the intake air ducting: de-throttling and adaptation tomatch the new maximum engine speed (topspeed.com)