Dragonman's Winter Days Rebuilding Motor Work

Published on January 12, 2024
Duration: 9:07

Dragonman demonstrates a specialized process for repairing and relocating Harley-Davidson cam bearing holes. This involves using custom fixtures and a dial indicator to precisely locate the center of the damaged hole, followed by drilling and milling to create a new bore for an interference press-fit bearing. The guide also covers the correct method for installing the new bearing using a specialized punch.

Quick Summary

Dragonman demonstrates a specialized process for repairing and relocating Harley-Davidson cam bearing holes. This involves using custom fixtures and a dial indicator to precisely locate the center of the damaged hole, followed by drilling and milling to create a new bore for an interference press-fit bearing.

Chapters

  1. 00:00Introduction and Fixed Motor Mounts
  2. 00:18Preparing Cases for Assembly
  3. 00:30Motor Assembly Services Offered
  4. 00:44Checking Connecting Rod Play
  5. 01:14Cost of Top End Rebuild
  6. 01:20Shipping Tips for Parts
  7. 01:53Lower End Rebuild Service
  8. 02:02Painting Cast Iron Cases
  9. 02:09Lower End Rebuild Components
  10. 02:17Piston Balancing Service
  11. 02:26Cylinder Boring and Piston Specs
  12. 02:34Piston Clearance and Rings
  13. 02:45Turnaround Time for Repairs
  14. 03:03Relocating a Cam Hole
  15. 03:10Using Custom Fixtures
  16. 03:28Using a Dial Indicator
  17. 04:07Drilling the Cam Hole
  18. 04:22Using an Endmill
  19. 04:30Specialty Endmill for Bearings
  20. 04:44Cam Bearing Installation
  21. 05:06Measuring for Interference Fit
  22. 05:30Cam Bearing Punch Bench
  23. 05:44Installing the Cam Bearing
  24. 06:11Fixing Wobbled Cam Holes
  25. 06:26Specialty Case Repair
  26. 06:38Timken Bearing Insert Repair
  27. 06:57Replacing Loose Timken Inserts
  28. 07:16Turntable for Cutting
  29. 07:27Sourcing Repair Parts
  30. 07:51Welding the Insert
  31. 08:11Fit of the New Insert
  32. 08:32Contact Information and Services

Frequently Asked Questions

How can I check for excessive rod play in my motorcycle engine?

To check for rod play, remove the head and barrel from the front cylinder. Position the flywheels at the bottom of their stroke, then gently move the assembly back and forth. If it gets very close to the flywheels, it's time for a rebuild.

What is the process for repairing a damaged Harley-Davidson cam bearing hole?

Repairing a damaged cam bearing hole involves using custom fixtures and a dial indicator to precisely locate the center. The hole is then drilled and milled with a specialized endmill to create a new bore for an interference press-fit bearing, which is then installed with a specific punch.

What are the recommended shipping methods for motorcycle engine parts?

For shipping motorcycle engine parts, it's advised to avoid private shipping stores that add markups. Instead, take your items directly to a UPS or FedEx terminal to secure the best shipping rates and avoid unnecessary costs.

Why is it important to paint cast iron engine cases?

Cast iron engine cases, whether silver or black, are susceptible to rust if not painted. Painting them after machining is a crucial step in preventing corrosion and maintaining the integrity of the engine components.

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