Posted September 26, 200816 yr 78 XS400. What does the PRI mean on the petcock and what is the purpose?
September 27, 200816 yr 78 XS400. What does the PRI mean on the petcock and what is the purpose? It means prime and it will fill the carbs without the vacuum normally required in the "on" position. here is a good explanation: What is a petcock
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