Maico 250 1977-81 400 1976-81 440 1981 5 Speed Main Bearing Kit Main Bearings are crucial to your vintage bike engine rebuild. Having new main bearings with new main seals is a must and VintCo has the solution. These engine main bearing kits are made with modern materials and manufacturing techniques to ensure an as good or better than OEM fitment and performance. The high quality main bearings. The OEM part numbers are provided as a reference to ensure exact fitment. This kit includes the two main bearings and two oil seals to complete your build with ease. This main bearing kit will fit all Maico 250 1977-81, 400 1976-81, and 440 1981 models. These newly manufactured engine main bearing kits from VintCo will help you keep the ride going!