KN Planning KOSO Majesty S SMAX Majesty S Mini3 Digital Head Water Temperature Thermometer Sensor MeterComes with a 12 month warranty from the date of purchase [Warranty only for genuine KN planned products] <> Mini3 meter series, head thermometer. This will help extend the life of his engine by controlling the temperature of the cylinder head, where the engine oil is most likely to be at its highest temperature. Yamaha Majesty S [S MAX] is equipped with a genuine sensor in the cylinder head and can be inserted into it, making installation very easy.