Harley Knucklehead Resurrection
Harley Knucklehead Resurrection
The Roaring Rumble of the Knucklehead: A History in Chrome and Combustion
Harley-Davidson M8 Engine Problems
Harley-Davidson M8 Engine Problems
Harley M8 engine with blown head gasket.
Thanks for the informative video, all makes sense to me. Those that disagree with your cause and effect explanation are going to do so regardless of what you say and show, that’s just the shitty side of human nature. This issue is fairly prevalent talking to Harley people. I really believe your theory is plausible or even probable. Read more 
Harley-Davidson engine
Harley-Davidson engine
This video is awesome…big help! The Harley Evolution engine disassembly and engine re-assembly.
The Harley-Davidson Evolution engine
From Wikipedia, the free encyclopedia:
The Evolution engine (popularly known as Evo) is an air-cooled, 45-degree, V-twin engine manufactured from 1984 by Harley-Davidson for the company’s motorcycles. Read more
Harley-Davidson Milwaukee-Eight Engine
Harley-Davidson Milwaukee-Eight Engine
My observation, is that Harley is returning to the single cam, concept, as they used to use on the pre-Twin Cam Era, i.e. EVO, Shovelhead, Panhead, engines. They have eliminated the inboard roller chain drive (inside the cam support plate), and have an easy to access, outboard roller chain drive. That is a positive development.
However, the con on this is that they have retained the pesky, PLASTIC cam chain tensioner, which is a wear item, and has to be periodically inspected and replaced or risk cratering the engine. With the increase in power and displacement, it is going to be putting a lot more power demand on the single roller chain drive, which has a propensity to stretch over time and can negatively affect cam/valve timing. I wonder if this added power demand, will wear out the cam chain tensioner, sooner, rather, than later. It remains to be seen. I wonder if they have retained a pressed-together crankshaft which can twist out of true, as they have been known to do, on the Twin Cam engines, on a hit or miss, basis, and can crater the engine, or if they have a bolted together, stronger crankshaft, as on the pre-Twin Cam Era, engines, which is a superior design. Read more
