Check the listing for details. Banshee Athena 68mm Big Bore Cylinders 421cc Stroker Crank Pistons Pro Head Cub. Condition: New. Listed at 1649.98 USD. AZ Quad Parts 421cc Athena Hotrods Complete 68mm Big Bore Stroker KitThis Is The Only +4mm Stroker Athena Kit On The Market!This Is The Complete Top To Bottom Motor Rebuild That Will Compete With The Cheetah Cub With A Fraction Of The Cost! With proper tuning on pump gas you can easily hit 95+ hp with this kit!Fits Yamaha Banshee YFZ 350Years 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 This 421cc Stroker Conversion Rebuild Kit Includes: Athena 68mm Big Bore Nikasil Plated Cylinders (Pair)AZ Quad Parts Designed Wiseco Pro Lite 68mm Custom Pistons PairPiston Kits Include Pistons, Rings, Pins, & ClipsForged AluminumLarger Port Windows For More Power Piston Only Wight 7.5ozThe Longest Lasting Highest Performance Direct Replacement Piston Kit!Cometic One Piece Custom Base GasketHeavy Duty Wrist Pin BearingsPro Design Cool HeadAZQP Custom 21cc Big Bore Domes (Other Sizes Also Available Upon Request)Hotrods 4mm Stroker Crankshaft With 115mm Heavy Duty Rods (True & Welded Ready To Install)Athena Oil Seal KitClutch Cover Gasket O-Ring KitWe ship worldwide & ship all domestic orders free!