These are Chinese fakes. The car didn't seem to work that well and I heard about fake NGKs. I went to the NGK website, there is a page dedicated to fakes. They showed 4 characters to look for to determine if it was fake and these forks failed on 3 characters out of 4. It could be worse than a rough run, there were problems with the insulators inside falling into the cylinders causing engine failures. Be careful.
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