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Athena Big Bore Piston - 478cc

$179.99 - $199.99
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Athena Big Bore Piston - 478cc - Main
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Product Description

Athena has developed a wide range of forged pistons specifically for use in the off-road / ATV market and manufactured using a revolutionary computerized technology originating from GP & F1 racing. Athena forged pistons offer the best solution in terms of performance and reliability thanks to redesigned squish areas, modified compression characteristics and advanced surface treatments, which improve their fluidity.

  • Replacement standard piston for the 97.94 mm Athena Big Bore Kit.
  • Specially designed, high-performance Cast-Lite, flat top piston.
  • Piston is sold complete with rings, wrist pins and circlips.
  • Note: Piston and directly related parts ONLY; all other parts sold separately.

Additional Specification:

  • For 97.94 mm big bore cylinder.
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1-1 of 1
Valik Over 4 years ago
What compration ratio is this piston?
MotoSport Staff Expert
Over 4 years ago
Well, depending on the year of your YZ450F, the compression ratio of these Athena big bore kits will either be 12.4:1 or 12.5:1.....
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