ORIGINAL HARLEY N. O. S. 250 CRANKSHAFT #23701-65P. I HAVE BEEN TOLD THIS FOR A 1965 1966 50CC M50 M50S. LOOKS IN GOOD CONDITION. LOOK AT THE PICTURES. I DO NOT KNOW THESE PARTS. I GO BY WHATS ON THE BOXES. PLEASE EMAIL ME WITH ANY QUESTION. PLEASE CHECK MY OTHER AUCTION.