No there should be a nipel on the pulg if it's to big for your boot unscrew the nipel .I got that plug and it my cheap motor didn't like it .I Whent for ngk b7hs or b6hs and some cheap motors like big gap's some just run stock gap . you never know till you try . some of my bikes don't Go Faster than 50kmh then open the gap and 63kmh hard to say every motor is different chep chep