Verify use before ordering. This item does not list street-use, OHV, emissions, homologation, or closed-course status in the available product details. It may be intended for closed-course competition, off-road/OHV, or non-highway use only. Please check applicable rules before purchase and installation.
KB PERFORMANCE Super-Duty Big Bore Piston Kit
KB PERFORMANCE Super-Duty Big Bore Piston Kit by KB PERFORMANCE is a engine parts listing built for riders searching by exact product name, fitment, style, and part number.
Key Features
- Valve pockets are designed to accept up to +4.00 mm oversized intake and exhaust valves
- Type 3 hard-anodized crown offers corrosion resistance for alcohol-added fuels
- Type 3 hard-anodized top ring groove eliminates micro-welding of ring to the groove and gives a hard-flat surface for ring to rotate on
- OE-style round wire locks are easily installed
- Heavy-duty wrist pins with true 0.9270” diameter to fit rods correctly
- Line2Line AST skirt coating starts out with a near-zero wall clearance and through the break-in period hones the cylinders to produce the correct oil wedge, keeping the piston square to the cylinder for best ring seal and quiet operation
- Kit includes pistons, rings, pins and locks
- Requires 4.250" bore cylinder sold separately.
Part Numbers
0910-6178, KB576LCA.005, 0910-6406, KB596LCA.005, 0910-6404, KB595LCA.005, 0910-6177, KB576LCA.STD, 0910-6405, KB596LCA.STD, 0910-6403, KB595LCA.STD
Available Styles
Piston Kit / 4.250" +0.005" / 11.4:1 CR / 124" Big Bore / 107" M8; Piston Kit / 4.250" +0.005" / 11.7:1 CR / 128" Big Bore / 114"/117" M8; Piston Kit / 4.250" +0.005" / 11.8:1 CR / 124" Big Bore / 107" M8; Piston Kit / 4.250" Standard / 11.4:1 CR / 124" Big Bore / 107" M8; Piston Kit / 4.250" Standard / 11.7:1 CR / 128" Big Bore / 114"/117" M8; Piston Kit / 4.250" Standard / 11.8:1 CR / 124" Big Bore / 107" M8
Available options: 6