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For Honda CBR300 CRF300 76mm Big Bore Cylinder Piston Gasket Kit
The OEM standard bore is 76.00mm - this 76mm kit maintains standard displacement. Precision dimensions: piston diameter 76.00mm (standard bore), piston rings 76mm set (2 compression rings + 1 oil ring), piston pin 15mm. The kit includes: 76mm cylinder block (aluminum alloy), 76mm piston (flat top/dish type, 10.7:1 stock compression), piston rings, wrist pin, circlips, and full top-end gasket set (cylinder head gasket, base gasket). For performance upgrades, 76.25mm (+0.25 oversize) high compression dome pistons (12.3:1 CR) and 78-79mm big bore kits (305cc) are available. Professional installation recommended for complete top-end rebuild - proper ring gap and torque specs required.
Ideal for restoring lost compression, eliminating blow-by, reducing oil consumption, and performing complete top-end maintenance on 286cc single-cylinder engines. Perfect for sport riding, off-road adventure, and engine rebuilding.