Big Bore Stroker Cylinder Kit (112cc)-5.5mm Oversize to 53.00mm, 14:1 Compression P400485100039 Brand: ATHENA Vehicle Type: Dirt Bike  Fitment: 2002/Yamaha/YZ85^^2003/Yamaha/YZ85^^2004/Yamaha/YZ85^^2005/Yamaha/YZ85^^2006/Yamaha/YZ85^^2007/Yamah Selling Unit: Each