Motorcycle 250cc Cylinder Kit For CB 250 Twister Abs 2017-2019 CRF250F 12100-K31-900 This cylinder kit is designed for use with 250cc motorcycle engines.It fits models including the CB 250 Twister Abs from 2017 to 2019 and the CRF250F.The kit includes a cylinder and piston assembly with 12100-K31-900.It is intended for engine rebuilds or performance.Components are manufactured to match specifications for proper fit and function.Installation requires standard mechanical tools and knowledge. This is an independent replacement component.References to brands or models are solely for compatibility indication.