Wrist Pin Bearings have come a long way since the 1970’s and VintCo now has high quality Wrist Pin Bearings available for most popular vintage bikes. These Wrist Pin Bearings are made with modern materials and manufacturing techniques to ensure an as good or better than OEM fitment and performance. This 18x22x24 Wrist Pin Bearing fits many models, some of the main models are:Maico 250 73-80 400 74-81 440 73-81 490 81 KTM250 77-81.  The OEM part numbers are provided to ensure an exact fitment as well.  A new high quality Wrist Pin Bearing is a needed investment when doing top-end work on your vintage dirt bike. VintCo helps you keep the ride going!