01 superglide
Road Master
Joined: Jun 2012
Posts: 809
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From: Honduras, Central America
[quote=SLV;12642309]
Ham,
Later in production, I think 2003, HD changed to a crank that has the throw-weights pinned to the shaft as opposed to the one-piece (more expensive, but more reliable) design. A pinned crank has potential for the throw-weight to migrate on the shaft and cause anything from minor vibration to serious engine damage. These things typically manifest themselves in higher states of tune. As power increases in a power-built motor, a welded crank is essential to keep the beast in line.
The Timken bearing is a more expensive, better performing bearing that maintains smoother operation and superior durability.
The '01 Twin-Cam engine is at the crossroads where the design had matured and HD started designing cost savings instead of reliability or performance.
Excellent explanation, I had a vague idea but this really hits the nail in the head, thank you.
Ham,
Later in production, I think 2003, HD changed to a crank that has the throw-weights pinned to the shaft as opposed to the one-piece (more expensive, but more reliable) design. A pinned crank has potential for the throw-weight to migrate on the shaft and cause anything from minor vibration to serious engine damage. These things typically manifest themselves in higher states of tune. As power increases in a power-built motor, a welded crank is essential to keep the beast in line.
The Timken bearing is a more expensive, better performing bearing that maintains smoother operation and superior durability.
The '01 Twin-Cam engine is at the crossroads where the design had matured and HD started designing cost savings instead of reliability or performance.
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