Athena Big Bore pistons are made from a high-silicon aluminum alloy, the same material used to produce Formula 1 pistons
Includes 3% copper in materials for better heat resistance
All pistons are forged using a precision heat-treatment process that allows for production tolerances of just 0.01mm
Piston tooling allows for the lightest available product
Kits include anti-wear coated piston, ring(s), pin and circlips
Athena pistons are sold individually
Made in Italy
Product Note:
Specification
Details
Bore
98 mm
Compression Ratio
12:1
Country of Origin
Italy
Displacement
478cc
Material
Aluminum
Piston Diameter
Varies (make selection above)
Piston Type
Forged
Size Over Standard
3 mm Larger than Stock
Vehicle Fitment
Fitment is guaranteed or your money back plus free return shipping.
Don’t waste time installing a product that doesn't fit. We worked hard ensuring that this product is an exact fit on the vehicles listed below.
Yamaha
YFZ450 ATV 2004-2009, 2012-2013
YFZ450R ATV 2009-2013
YFZ450X ATV 2010-2011
Customer Reviews
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Questions & Answers
Piston
By N/a
What size is the piston
Once you select your make, year and model from our fit guide and then choose the size over standard for the piston kit you have, the exact piston diameter will be displayed below the main item's description.
Have a question? Please ask our experts and customers who own this product.
