Quantity Discount on 12 or more Denso Iridium Spark Plugs
The spark plug is an important tuning tool for you kart engine. You use a hotter plug in cooler conditions and cooler plug in warmer conditions. When you go from a cooler to hotter plug you are leaning out the motor slightly.
This is the recommended and spec. plug for Rotax. We also prefer it when racing CR125 Stock Honda.