It is use by WR250X.Although it is mainly a run in a Circuit, the difference from a Normal plug can be felt.There is touch that growth is different in a high rotation area just before hitting especially a Rev limiter.About a Normal plug, since it was exchange after a 2000-km run, possibly there was also a difference with a new article Plug.After the Circuit run, since it went into a new Plug off season although it was exchange when it was original, it ran about 1000 km on the Touring, without exchanging.Although the continuous duty in low rotation had uneasiness by the Racing plug, it was satisfactory at all.Although the glow situation of the
Plug is also good, I think too that early exchange is required by the Racing plug in the Circuit which carries out the continuous duty of the high rotation.
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