Description
✨Athena Cylinder Stock Bore Kit 54.00 mm P400485100003 for 1997-2004 Yamaha YZ125
Turn your 1997-2004 Yamaha YZ125 into a fire-breathing two-stroke beast with the Athena Cylinder Stock Bore Kit 54.00 mm – P400485100003. This ain’t your average top-end kit—it’s a power-boosting, throttle-twisting, ride-changing upgrade!
The aluminum cylinder is nickel carbide-coated with larger water jackets to keep things cool when the ride gets hot. The Athena Cylinder Stock Bore Kit 54.00 mm also comes with hard-anodized power valves (sorry OEM, you’re benched), a bronze-domed aluminum head, Cast-Lite piston, and a full top-end gasket set. It’s bolt-on easy, with no guesswork.
Want more torque? Better cooling? A reason to twist the throttle harder? You’ve found it.
✅ Boost horsepower
✅ Easy install
✅ Race-proven durability
📦 Buy now and give your YZ125 the love it deserves!
FAQs:
Q: Will this fit my 2003 YZ125?
A: Yes! Fits all 1997–2004 Yamaha YZ125 models.
Q: Does it include gaskets and piston?
A: Absolutely—complete top-end kit with everything you need.
Q: Do I need OEM power valves?
A: Nope—this kit includes specially designed Athena valves.
Click to see additional performance parts for your Yamaha YZ125
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