ATHENA Big Bore Cylinder Kit P400485100012 290cc for Yamaha
for YAMAHA WR F, WR R 4T, WR X 4T, YZ F
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The Big Bore cylinder kit of 290cc is specifically designed for Yamaha models, offering a significant increase in engine performance. Made from high-quality aluminum alloys, this cylinder is the result of over a decade of innovation and research in manufacturing technologies. Thanks to an advanced manufacturing process and rigorous quality controls, the cylinder ensures reliability and longevity.
With a bore of 83 mm and a stroke of 53.6 mm, this kit offers a displacement of 290 cc and a compression ratio of 12.5:1, ensuring a maximum power of 36.9 HP at 9,800 RPM. The water cooling system helps maintain optimal temperatures during intense use, while the piston pin diameter of 16 mm and the three piston rings ensure a perfect seal and high performance.
- Bore: 83 mm
- Stroke: 53.6 mm
- Displacement: 290 cc
- Compression ratio: 12.5:1
- Maximum power: 36.9 HP at 9,800 RPM
- Cooling system: water
- Piston pin diameter: 16 mm
- Number of piston rings: 3
