Motorcycle Shop Machines

Published on May 6, 2026
Duration: 10:21

Dragonman, a seasoned machinist specializing in vintage Harley-Davidson engines (1936-1999), details his comprehensive machine shop operations. He showcases specialized equipment for tasks like cylinder honing, valve guide machining, connecting rod reconditioning, and flywheel balancing. The video emphasizes the precision required for rebuilding these classic engines, highlighting custom fixtures and the importance of quality parts and meticulous workmanship.

Quick Summary

Dragonman specializes in rebuilding original Harley-Davidson motor parts from 1936 to 1999. He increases engine compression by cutting down cylinders, noting that every 0.000050 inches of length reduction adds about 1.5:1 compression. A lower end rebuild costs $395-$400, and head work is $295.

Chapters

  1. 00:02Introduction to the Machine Shop
  2. 00:06Harley-Davidson Engine Parts (1936-1999)
  3. 00:23Dual Spark Plugs & Engine Heads
  4. 00:30Seat Master Machine & Nickel Seats
  5. 00:52Motor Testing Stand
  6. 01:00Rod Reconditioning Machine
  7. 01:18Dial Indicator Measurements
  8. 01:34Crank Bench & Roller Bearings
  9. 01:42Honing Machines & Mandrels
  10. 01:52Connecting Rod Work
  11. 02:05Steel Insert Repair Challenges
  12. 02:21Automatic Honing Machine
  13. 02:37Honing Process & Dial Indicator
  14. 02:56Honing Rate & Precision
  15. 03:14Fine Honing & Crosshatching
  16. 03:37Valve Guide Machine
  17. 03:47Teflon Seals & Valve Types
  18. 03:57Boring Bar Usage
  19. 04:04Countersinking Heads & Cases
  20. 04:14Parts Stock & Bearings
  21. 04:26Parts Rooms Overview
  22. 04:32Valves, Pistons, Cams in Stock
  23. 04:46Bearing & Bushing Punches
  24. 04:55Valve Guide Stock
  25. 05:02Bushing Removal Tools
  26. 05:11Bushing Installation Tool
  27. 05:20Connecting Rod Races
  28. 05:28Digital Readout Machine
  29. 05:35Engine Seat Machining
  30. 05:42Valve Guide Hole Relocation
  31. 05:54Hole Locating Machine
  32. 06:04Blueprint Reference
  33. 06:07Cutting Nickel Seats
  34. 06:1890° Angle Plate Machine
  35. 06:24Flywheel Shaving Lathe
  36. 06:43Lathe Operation & Gears
  37. 07:02Machinist & Machine Relationship
  38. 07:12Rebuilt Lower End Example
  39. 07:21Timken & Roller Bearings
  40. 07:32Boring Services Pricing
  41. 07:38Head Rebuild Pricing
  42. 07:41Head Rebuild Components
  43. 07:55High Lift Cam Considerations
  44. 08:02Port Flange Modification
  45. 08:13Head Restoration Example
  46. 08:23Evolution Motor Rebuild
  47. 08:29Damaged Connecting Rods & Pistons
  48. 08:36Oil Pump & Breather Gear Repair
  49. 08:47Engine Rebuild Timeline
  50. 08:50Lower End Rebuild Pricing
  51. 09:09Transmission Rebuilds
  52. 09:14Transmission Rebuild Pricing
  53. 09:29Increasing Compression Methods
  54. 09:35Cutting Down Cylinders
  55. 09:43Compression Ratio Calculation
  56. 09:53Pros of Cylinder Cutting
  57. 10:04Contact Information & Services
  58. 10:17Closing Remarks

Frequently Asked Questions

What years of Harley-Davidson engines does Dragonman specialize in rebuilding?

Dragonman specializes in rebuilding original Harley-Davidson motor parts from the years 1936 to 1999. He specifically avoids working on 'look-alike' models produced from 2000 onwards, focusing on the authentic vintage engines.

How does Dragonman increase compression in Harley-Davidson engines?

Dragonman increases compression by cutting down the cylinder. He states that for every 0.000050 inches the cylinder is shortened, the compression ratio increases by approximately 1.5:1. This method is preferred over heavy, expensive aftermarket pistons.

What is the cost for a lower end rebuild on a Harley-Davidson motor?

A lower end rebuild for a Harley-Davidson motor, including new bushings, gaskets, seals, and bearings, costs $395 if the oil pump and cam are not included. With the oil pump and cam, the price is $400.

What services are offered for Harley-Davidson cylinder heads?

Dragonman offers head rebuilds for $295, which includes stainless steel valves, Ampco guides, Teflon seals, a two-angle valve job, and spring tension setting. High-lift spring kits are an additional cost.

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