Features: Bore Size: STD 83 mm Piston diameter: 82.9 mm Piston height: 57.5 mm Piston pin diameter: 19 mm Piston pin height: 58 mm Sold in complete unit, which includes piston, rings, pin, clips, & top end gasket kit (you get exactly what is pictured). Gasket with great sealing performance, leakage prevention Promote combustion and provide enough horsepower Excellent heat dissipation, ensure for driving experience Wear resistance and heat resistance, long service life Meet and exceed original standard and fitment, direct replacement Replaces Part Number: Cylinder: 5FU-11310-01-00, 5FU-11310-00-00, 4GB-11310-00-00 Piston: 4GB-11631-00-Y0 Piston Ring Set: 4GB-11610-00-00, 42Y-11610-00-00, 42Y-11610-01-00 Wristpin: 51Y-11633-00-00 Circlip(2): 93450-19095-00 Cylinder Head Gasket: 1UY-11181-00-00, 1UY-11181-01-00 Cylinder Base Gasket: 4KB-11351-00-00, 3GD-11351-00-00 Chain Tensioner Gasket: 3GD-12213-00-00 O-Ring: 93210-86509-00 Fitment Fit for Yamaha Kodiak 400 1993-1999 Fit for Yamaha Big Bear 400 2000-2012 Note: Please check the details of the item in specification and pictures before you purchase, especially the Wheel Bolt Pattern, Hub/Center Bore and Thread Pitch! Fitment above is for reference only, you can feel free to contact us if you are not sure whether the item is suitable for your car Please kindly understand that the actual color and the size of the item may slightly vary from the presented pictures Professional installation is highly recommended