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Jetting & Plug

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Help! can you please tell me where in Mo. i can get a jetting kit for my 1998 wr400f?Also what plug should i be running,I was told that the higher the number on a ngk plug the hotter burning it was,is this correct?

Pintail

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:applause::lol: JD jet kit is the way to go,they have a web site,you can buy direct from them.You should use the plug that is O.E.for your WR.

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