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Break-in Period
During the first 300 miles (500 km) of running, follow these guidelines to ensure your vehicle's future reliability and performance.
● Avoid full-throttle starts and rapid acceleration.
● Avoid hard braking and rapid down-shifts.
● Ride conservatively.
fyi.. sustained high rpm should get a colder plug, not a hotter one.
Spark Plug Basics - NGK Spark Plugs
Get the spark plug basics, from overheating and misfires to ignition timing and knocking.ngksparkplugs.com