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Does anyone know what specific spark plugs we should be using for standard riding and high speed riding? Looking for part numbers, recommended brands, and even spark plug gap numbers just in case we need to gap them if not pre-gapped.
 

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Does anyone know what specific spark plugs we should be using for standard riding and high speed riding? Looking for part numbers, recommended brands, and even spark plug gap numbers just in case we need to gap them if not pre-gapped.
Standard speed: CPR6EA-9 (NGK) or U20EPR9 (DENSO)
High speed: CPR7EA-9 (NGK) or U22EPR9 (DENSO)

This is for the U.K bike MSX125. I expect the plugs would be the same for the Grom.
 
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