Home / Honda / ATC250R / Engine / Spark Plug Cap Spark Plug Cap$10.00 Non resistor spark plug cap. Spark Plug Cap quantity Add to cart Categories: ATC250R, Engine, Engine, Honda, HPI Ignitions, TRX250R Description Description Non resistor spark plug cap. Related products ExhaustHonda TRX250R Small Bore Silencer Round Big Body For use with LED 250C pipe. For engine sizes 250-310. Round muffler big body. EngineHonda TRX250R Seal Kit Seal kit HondaTransmission & Clutch TRX250R Transmission Bushing Kit For 87-89 TRX250R. HondaTransmission & Clutch Hinson CR125 Fiber Clutch Plates Individual Plates sold individually.