Navigating Dragonman's Motorcycle Machine Shop

Published on February 11, 2026
Duration: 7:27

This video showcases the specialized engine machining services offered by Dragonman, a master machinist with 59 years of experience. He details processes for rebuilding Harley-Davidson motors, including connecting rod reconditioning, precision cylinder honing to 1.5-2 thousandths clearance, bearing race replacement, valve and guide machining for various classic Harley engines, boring for big bore kits, and flywheel shaving for performance enhancement. Dragonman also addresses material upgrades for valve seats and valves to combat issues with modern fuels.

Quick Summary

Dragonman, a master machinist with 59 years of experience, details Harley-Davidson engine rebuilding processes. He achieves precise cylinder honing to 1.5-2 thousandths clearance and shaves flywheels by 2-2.5 lbs for better responsiveness. He also upgrades valve seats with nickel alloy and uses stainless steel valves to combat modern fuel issues.

Chapters

  1. 00:00Introduction to Motorcycle Machining
  2. 00:16Connecting Rod & Mandrel Work
  3. 00:41Bearing Race Machining
  4. 00:58Cylinder Honing Process
  5. 01:51Valve & Guide Machining
  6. 02:15Boring & Press Work
  7. 04:27Flywheel Shaving
  8. 06:05Head Restoration & Materials

Frequently Asked Questions

What precision is achieved in Dragonman's cylinder honing process for Harley engines?

Dragonman hones cylinders to precise tolerances, setting clearance to 1.5-2 thousandths of an inch. His automatic stroker machine efficiently removes 0.010 inches of material every three minutes for optimal engine performance.

How does Dragonman improve Harley-Davidson engine responsiveness through machining?

By shaving Harley-Davidson flywheels on a LeBlond lathe, Dragonman reduces their weight by 2 to 2.5 pounds. This modification significantly enhances engine responsiveness and acceleration.

What solutions does Dragonman offer for valve seat issues in older Harley engines?

Dragonman addresses pitted valve seats, often caused by modern fuels, by replacing them with durable nickel alloy seats. He also installs stainless steel valves to ensure longevity and resistance to wear.

What specialized machinery does Dragonman use for engine rebuilding?

Dragonman employs a range of specialized machinery, including a rod reconditioning machine, an automatic stroker for cylinder honing, a Quick-Way boring machine for big bore kits, a Sunnen press for component work, and a LeBlond lathe for flywheel modifications.

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