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Yamaha Banshee 350
Banshee Athena 421cc 68 Big Bore +4mm STROKER Cylinders WISECO Pistons Domes Pro Design Cool Head


Starting from $1,149.99

Complete Athena 68mm 421cc Top End Rebuild Kit With Custom Made Wiseco Pistons & Pro Design Cool Head For A +4mm Stroker Crankshaft

The Absolute Best Big Bore Kit On The Market! 

Fits Yamaha Banshee YFZ 350
Years 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006

This Kit Includes:
  • Athena 68mm Nikasil Cylinders (Pair)
  • AZ Quad Parts Designed Custom Wiseco Pro Lite 68mm Pistons Pair (Includes Pistons, Rings, Pins, & Clips) (For Stroker Conversion)
  • Pistons Are Forged Aluminum With Larger Port Windows For More Power
  • Athena Gasket Set
  • Cometic One Piece Base Gasket
  • Pro Design Cool Head 
  • AZQP Designed Billet Big Bore Domes (Set Up For Pump Or Race Gas, Specify At Checkout Or You Will Receive Pump Gas Domes)
  • Designed to Work With a +4mm Stroker Crankshaft With The 115mm Long Rods ONLY
  • Pro Design Cool Head O-Ring Kit
  • Pro Design Heavy Duty Head Stud Kit
  • Heavy Duty Wrist Pin Bearings


Price: $1,149.99
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  2. Banshee Athena 421cc 68 Big Bore +4mm STROKER Cylinders WISECO Pistons Domes Pro Design Cool Head
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