All of the manuals specify Champion RG6YC as the recomended plug too install in the GT 200, 2006. Champion does not have this plug in their catolog. In the Vespa Service manual it shows a picture of a NKG plug but no numbers. What is the correct plug?
THIS plug is also correct for ET4 150 Leader engine. Autolite 4303 is also a direct sub for Champion RG6YC. Advance Auto Parts seems to carry a full line of Autolite plugs, but get the number first, from the internet, before you go in! An Iridium sub is Denso IU22. The NGK CR7EIX is also an irdium plug.
You can get the Champion RG6YC Plug here for less than the dealers charge - $4.70... it is used on Polaris ATVs - Grandbury Motorsports and ask for: CHAMPION REF #: RG6YC, THREAD: 14mm, REACH: NA, Part#: 2103-0075. I ordered 4 of them just a month ago.
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