Motorcycle Engine Part 66mm Air Cylinder Block For CRF150RB CRF150R Expert 12100-KSE-670 12100-KSE-671 12100-KSE-672 Material Type: Aluminium OEM Code: 12100-KSE-670, 12100-KSE-671, 12100-KSE-672 Compatibility: CRF150R, CRF150R Expert, CRF150RB Expert Special Features: Performance Design and Style: CNC Machined for Performance: Optimized for CRF150R Series Engines The 66mm air cylinder block is engineered to enhance the performance of CRF150R, CRF150R Expert, and CRF150RB Expert models.Constructed from aluminium , the cylinder block offers a lightweight design with improved.CNC machining ensures accurate dimensions for installation and consistent engine. The manufacturing process adheres to ISO9001 external testing standards, supporting and performance consistency.Designed specifically for CRF150R series engines, this cylinder block supports efficient power delivery and improved engine response. The cylinder block is built to perform under varied riding conditions, maintaining stable across different temperatures.It is capable of withstanding temperatures up to 105℃ while maintaining emissions within specified limits.Suitable for off-road and highway use, it delivers smooth power output for a more responsive riding experience. Compatibility Notice: This is an aftermarket product.Mention of brands is for fitment identification only.