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Athena
490cc Big Bore Cylinder Kit
$792.95 - $845.95 
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Product Description
Athena 490cc Big Bore Cylinder Kit

  • Bolt on kit, no machining required
  • Aluminum cylinder with nickel-carbide coating designed with wider water jackets
  • Complete piston kit, Forged piston with molybdenum coating
  • Complete top end gasket set
  • Easy to follow step-by-step installation instructions
  • Average power gains of 5hp can be seen in most models
Compression ratios are as follows

  • CRF450R/X has 11.6:1
  • KX450F has 12.0:1
  • RMZ450 has 12.0:1
  • LT-R450 has 13.03:1
Note: Images are for reference only; Images may not show your specific cylinder kit.
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