Yamaha IT400 YZ400 1976-79 MX400 1975 IT425 1980 IT465 1981 YZ465 1980-1981 Main Bearing Kit KMB029

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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 Yamaha 1976-79 IT400 and YZ400, 1975 MX400, 1980 IT425, 1981 IT465 and 1980-81 YZ465 models. These newly manufactured engine main bearing kits from VintCo will help you keep the ride going! 


  • 2 Bearings / OE# 93306-30615-00
  • Seal / OE# 93103-30150-00
  • Seal / OE# 93103-40091-00