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Message: [QUOTE="MN KDXer, post: 209550, member: 16126"] The "scoop" on these plugs was that, under sustained high rpms, there exists a chance that the ground tang can break off. (vibrations reaching critical frequency?) FWIW, the neighbor kid's 00 CR125 suffered a broken ground tang with an NGK plug; the loose tang beat the snot out of the piston crown and head before exiting the engine. If you look closely at the two plugs, there is a definite difference in total length of the ground strap. Whether this is an NGK only event, or if Champ plugs are also so affected, I do not know. [/QUOTE]