56 Years of Motorcycle Rebuilding at Dragonman's

Published on June 3, 2023
Duration: 8:09

Dragonman details extensive motorcycle engine and transmission rebuilding services, specializing in case repair, crankshaft reconditioning, and flywheel modification for Harley-Davidson models from 1936 to 1999. He showcases specialized machinery for tasks like valve seat cutting, cylinder boring, and connecting rod honing, emphasizing precision and efficiency in his workshop.

Quick Summary

Dragonman offers specialized motorcycle engine and transmission rebuilding, focusing on case repair, crankshaft reconditioning, and flywheel shaving for performance. His services include precision machining for valve seats, cylinders, and connecting rods, with a 5-day turnaround for motor rebuilds and a comprehensive 'rebuild your own motor' package.

Chapters

  1. 00:00Introduction to Dragonman's Machine Shop
  2. 00:07New Glass Beading Machine
  3. 00:23Case Repair Sections Explained
  4. 00:54Three Port Exhaust for Racing Bikes
  5. 01:15Counter Shaft Case Repair
  6. 01:26Main Race Replacement on Cases
  7. 01:37Exhaust Port Installation for Panheads
  8. 01:57Seat Master Machine for Valve Seats
  9. 02:16Shaved Flywheels for Performance
  10. 02:49Motor Testing Stand
  11. 03:03Connecting Rod Rebuilding Machine
  12. 03:14Turntable for Case Repair
  13. 03:31Automatic Pony Machine for Boring
  14. 03:42Valve Grinding Machine
  15. 03:52On-Site Parts Room
  16. 04:07Honing and Boring Machines
  17. 04:20Bushing and Race Removal/Installation Tools
  18. 05:05New Races and Bushings
  19. 05:15Transmission Bench and Flywheel Assemblies
  20. 05:37Cutting Brass Seats on Panheads
  21. 05:44Relocating Valve Guide Holes
  22. 05:48CNC Machine for Harley-Davidson Holes
  23. 06:03Machining Sportster Seats
  24. 06:15Cylinder Deck Fly Cutting
  25. 06:28Cylinder Cutting for Compression
  26. 06:365-Day Motor Rebuild Turnaround
  27. 06:42Rebuilt Lower End Example
  28. 06:54'Rebuild Your Own Motor' Package Details
  29. 07:30Flywheel Reassembly Service
  30. 07:52How to Ship Parts for Service
  31. 07:59Contact Information and Closing

Frequently Asked Questions

What specialized services does Dragonman offer for motorcycle engines?

Dragonman specializes in extensive motorcycle engine and transmission rebuilding. His services include intricate case repair, replacing blown-out transmission cases, crankshaft reconditioning, and flywheel shaving for performance gains. He also performs valve seat machining and cylinder boring.

How does Dragonman improve motorcycle engine performance through flywheel modification?

Dragonman shaves flywheels to significantly reduce their weight, similar to the effect of a stroker motor. This reduction in mass allows the engine to reach higher RPMs faster, resulting in improved acceleration and responsiveness without altering the engine's stroke.

What is involved in Dragonman's connecting rod rebuilding process?

The connecting rod rebuilding process at Dragonman's utilizes a specialized machine that hones out the races and bushings. Precise measurements are taken with dial indicators, and new races and bushings are then pressed into place to ensure the rods are in optimal condition.

What does Dragonman's 'rebuild your own motor' package include?

The 'rebuild your own motor' package for $1200 includes Hastings rings, 8.5:1 compression pistons bored to the next size, a two-angle valve job with stainless steel valves, Amco guides, Teflon seals, glass beading, and spring tension set to 175 lbs. It comes with a top-end gasket set.

How can customers send their parts to Dragonman for service?

Customers are advised to box their parts securely, preferably in a plastic milk crate with cardboard padding, and ship them via UPS or FedEx. This ensures the parts are protected during transit to Dragonman's workshop for rebuilding.

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