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What are you guys using for replacement top ends in your KX250Fs? How much time you getting out of these things? Picked up a low hour 2023 model. Don’t really want to do a big bore but feel free to share your opinions on them too. Thanks!
I did the top end both on the 21 and 23 at the 50 hour mark, piston was still decent but had not much left, likely 10/15 more hours.
Top 5 B class speed, always treated like a queen. Do it if you plan tro keep the bike.
I sold both the 21 and 23 around 100 hours, never had issues (not even on the clutches)
OEM is Wossner, hard to go wrong there. I've used a bunch of brands and never had any issues, I'm pretty meticulous with maintenence, though. OE, Pro-X, wiseco and even namura. Pick one you're comfortable with, don't overthink it and let her rip tater chip!
Good info guys. Appreciate it. I’ve always been a Honda/Yamaha guy. How the valves and seats holding up in these things? You guys doing timing chains when you’re doing pistons too? I’m a A class woods guy. Fast woods though, GNCC type stuff.
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If you're taking the head off, I would always replace the cam chain.
OEM with a fresh timing chain it is. Thanks guys.
I've noticed the timing chains kinking on KXs when replacing top ends.
OEM kawasaki pistons are made by Wossner? Where did you get that info?
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