John Harman 120 Shovelhead Monster Motor

  • 2100.00 £
  • Published date: March 18, 2024
    • Godalming, Surrey, United Kingdom

John Harman 120 Shovelhead Monster Motor


⭕ Up for sale is a Harman 120 monster motor! John Harman made his own engine cases and dual carb heads to create what was at the time the wildest performance Harley motor available. I have a ton of documentation for this motor, including original Harman instructions for building and setting up the motor! The motor itself is set for external greasing instead of internal top end oiling, so the tappet blocks have zerk fittings and the custom machined heads have cutouts to grease the rockers.
The dual carbs are S&S B-carbs in great shape. This Motor is 4.25 bore by 4.25 stroke and all of the internals are top of the line. Flywheels and rods are S&S, as is the oil pump. Pushrod tubes are custom-made clear tubes. Not only do you get this extremely rare motor, but you get an extra Harman cylinder head and an extra set of pistons. Also included is a set of steel exhaust flanges so you can make your own exhaust, as these were custom made to 2 diameter to fit the heads.
If you have any questions, please let me know.

Phone number ✆ 01737 557914
Godalming, Surrey




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