Honda CRF50 Big Bore 88cc Engine Needs Work. I believe this motor was pulled from a 2005 Honda CRF50. This motor needs work on the clutch side of the motor, I received it this way and I don't know exactly what it needs although it does have a big bore top end which seems to be in good shape. Has a stator but it's a Chinese stator although the bottom end and the rest of the parts are all Honda Japanese made