Wiseco

PK1401

WISECO PISTON PISTON KIT W/GASKETS PK1401

Pistons

Dedicated forging Light weight and superior strength Dome design Improved flame travel Chrome plated piston pin Reduced friction/scuff resistant Horizontal slot pin oiling Pressure seal groove Maximum ring seal Skirt coated Armor Glide Dedicated rings Maximum compression and oil control Race-Ready dome finish Smooth edges for improved combustion flow Note: All kits cover a single cylinder only All Wiseco 4-stroke top end kits include 1 piston, 1 ring set, 1 wristpin, 2 circlips and gaskets unless otherwise noted Wiseco top end kits are sold by application and bore size. To ensure you receive the correct kit for your application, you must know the standard bore size to make sure you are ordering either the standard or correct amount of oversize that you need. If you have any questions, please email us. Wiseco Part#: PK1401 Product Type: Piston Kits Specifications: Bore - Standard: 77.00mm Cylinders: 1 Bore - Oversize: STD Displacement: 250cc Bore - Actual: 77.00mm Note: Nikasil Bore Stroke: 53.6mm Compression Ratio - Actual: 12.5:1 Item Contents: 4882M07700 - Yamaha YZ/WR250F 05-11 12.5:1 STOCK CR 7700XU - 77MM RING SET .9 X .8 X 1.5 CW16 - ROUND WIRE PIN LOCKS 16MM (PAIR) S742 - Piston Pin- 16 x 9.91 x 41.91mm 9310 W5921 - GASKT KIT-YAM YZ/WR250F '01-11 77-79MM


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