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spark plug type, # 450x

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so i have a few hundred dollar gift card buring a hole in my pocket so i am buying stuff that i dont really need but might come in handy like a spark plug. I cant find the owners manual for my 450x. Anyone know what plug it takes.

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Hi ... need an information about sprak plugs

What is the difference between these :

Standard IFR8H11 (NGK)

Optional IFR9H11 (NGK)

:thumbsup:

THX.

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Hi ... need an information about sprak plugs

What is the difference between these :

Standard IFR8H11 (NGK)

Optional IFR9H11 (NGK)

:worthy:

THX.

heat range :thumbsup:

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The optional plug, IFR9H11, is a colder plug. I've never used one so I can't say how it would affect performance, starting, etc. The standard plug has always worked well for me.

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