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: Honda, ATC250R, Engine, TRX250R, Engine, HPI Ignitions 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. ATC250REngine TRX250R Bottom End Kit TRX250R Bottom End Kit ExhaustHonda TRX250R Small Bore Exhaust 250C LED 250C pipe. For engine sizes 250-310. Best for dunes, MX, flat track, and play riding. Raw finish EngineHonda TRX250R Seal Kit Seal kit