74-78 Honda CB550K/CB550F Bigbore pistons kit with Head Gasket Aftermarket Piston size: 61.50mm(3mm Oversize) Head gasket: Bore size is 63-63.5mm Set includes: pistons, pins, clips, rings and head gasket Note: Cylinder boring required Fit models are follow 74-78 CB550K 75-77 CB550F -ATTENTION- This parts are aftermarket. Not same as Honda Genuine parts. Different a shape, design and sizes for included all parts. Air postal charges are determined by the weight of the package, and not the number of the contents.If a defect is found, the item will be exchanged for another. The item "HONDA CB550K CB550F 600cc BIGBORE PISTONS KIT 61.50mm PISTON 10-CB550KBB" is in sale since Saturday, June 24, 2017. This item is in the category "eBay Motors\Parts & Accessories\Motorcycle Parts\Engines & Engine Parts\Pistons, Rings & Pistons Kits". The seller is "cruzinimage_co" and is located in Chiba, default. This item can be shipped worldwide.