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 HondaIntake 1987-89 TRX250R Stainless Steel Intake For 1987-89 TRX250R only. 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 HondaIntake 1986 TRX250R Stainless Steel Intake For 1986 TRX250R only. ExhaustHonda TRX250R Big Bore Pipe 350G LED 350G pipe. For use with motor sizes of 330-390 Best for dunes, ice racing, TT, and MX. Price is for the pipe only.