Henderson Engine Case Restoration 1917

This 1917 Henderson Motorcycle engine needed the engine case restored. This engine case is for the earliest 3 speed known to date. Prior to 1917, all Henderson engines were 1 speed. 1917 was the first year of the 3-speed transmission.

A lot of torch repair was done on the transmission. The transmission was too badly damaged from previous repairs to be used. A new top half of the transmission needed to be fabricated.

We measured and reverse engineered the original parts, and input the dimensions into 3-D milling software. A block of 6061 T6 aluminum was then used for machining the new part to precise dimensions, creating a brand new replication of the original.

This old 1917 Henderson motorcycle engine has a new life and is ready to push some wheels down the highway again.

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