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 Big Bore Pipe 350D LED 350D exhaust. For use with motor sizes of 330-390 For cross country, MX and trail riding applications. Price is for the pipe only. EngineHonda TRX250R Seal Kit Seal kit HondaTransmission & Clutch Hinson CR125 Fiber Clutch Plates Individual Plates sold individually. EngineHonda TRX250R Water Pump Mechanical Seal Water pump mechanical seal.