14/45 gearing for KLX, do I need a new chain too?

[FrankT]

I am considering putting a 45 sprocket at the rear of my KLX but keep the standard 14 in the front would this mean I need a new (longer) chain too?
Pleased to hear.
Tnks

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[Maha]

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[mikehohman]

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[FrankT]

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[mikehohman]

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