power valve for 144

i just got my hands on an athena 144 kit for my yz 125 and it dosent have any power valve components. i was just wondering if i could just use the power valve from my stock cyl.

Not unless you match it to the bigger bore / circumfrence

I had problems with the pins on my Athena power valves so I sent my stock ones to Eric Gorr to be machined to fit the big bore. Works perfect and cost me $42. I had to send them with the cylinder to make sure they were cut right.

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