Tag NGK Iridium

Spark plug replacement on the Dominar 400 is not only about upgrading to iridium. It is about keeping the bike reliable during daily commutes, rainy starts, traffic heat, and long ownership. This guide explains the estimated cost, common symptoms, labor considerations, and when riders should replace the plugs before hard starting becomes a bigger problem. It also connects spark plug maintenance with battery health, engine behavior, and real Philippine riding conditions.