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The thermal grade of the spark-plug is of prime importance with tuning...
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The thermal grade of the spark-plug is of prime...
The thermal grade of the spark-plug is of prime importance with tuning kits; if the wrong grade is used the kit will overheat or the spark-plug will foul. A hotter spark plug transfers more heat to the cyl head, which may lead to piston seizures. The Corsa kit comes with the correct spark-plug, for other kits we recommend the plug listed here. As a rule racing cylinders use "colder" plugs (i.e.: Bosch W2), for sport and standard kits we recommend a hotter spark-plug. Our list gives you the Bosch grades in brackets. Many rev counters require a resistor sparkplug to work properly.
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