Same-day shipping cutoff: Noon Pacific Time

Spring time is in full swing here at ProCycle.  With these busy days please be sure to let us know if your order is time sensitive.  We try to do as much as we can to accommodate your upcoming trip.  

Choose Heat Range for Spark Plugs

When choosing a plug the heat range must be carefully selected for proper spark plug performance. The two most common causes of spark plug problems are carbon fouling and overheating.

Carbon fouling can happen if you do continuous low speed driving, short trips, the air-fuel mixture is too rich, or lowered compression due to wear.

Overheating results in accelerated electrode wear and can cause pre-ignition.

Choose a hotter plug if you experience carbon fouling  (the lower the number, the hotter the plug). Otherwise we recommend standard temperature plugs to avoid overheating.