Easy to install and give tons of power.
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Purchased a stock bore Athena replacement cylinder. Would've been nice to know they intentionally spin the stud bold holes 180 degrees so you have to buy their cylinder head. Next time I'll just spend the extra money and buy an OEM jug. Not worth the hassle of going aftermarket.
With v force reeds this thing runs super clean and crisp. Good power.
My stock cylinder was trashed. Picked up the Athena kit and after the simple install there was noticeable performance gains.
Bought this kit for my YZ125 that I had blown up. It was super easy to install and got me back into the season without missing a race and the bike seemed to have a little more power also.
Feel free to give us a call at 888-676-8853 and we would be happy to help you out with your order.