The Big Bore Cylinder Kit (Part Number: 12001-K01) is designed to enhance the performance of Honda CRF250R (2004–2009) and CRF250X (2004–2017) models. By increasing the displacement to 256cc with a 13.0:1 compression ratio, this kit provides improved power and efficiency. When paired with the Hot Rods #4183 crankshaft, the displacement increases further to 263cc. The kit includes all necessary components for installation, making it an ideal upgrade for riders seeking enhanced performance.

Features:

• (+1mm Big Bore Kit) increases displacement to 256cc.
• Achieves a 13.0:1 compression ratio for enhanced performance.
• When used with Hot Rods #4183 crankshaft, displacement reaches 263cc.
• Includes cylinder, piston, rings, pin, clips, and gaskets.
• Compatible with Vertex #23461 piston.

Vehicle Compatibility:

• Honda CRF250R: 2004–2009
• Honda CRF250X: 2004–2017

Cross-Reference Part Numbers:

• 12100-KRN-672
• 12100-KRN-730
• 12100-KRN-731
• 12100-KRN-732