As always with these old engines, nothing is cut and dried.
some say these are simple bikes. i dont buy into that at all. just the opposite is my mindset.
lookin at things with an open mind and an unbiased eye seems to lead to a better understanding of these bikes.
bikes that were the product of lessons learned by a small group of guys after over a half century of building every single hd ever made.
simple. thats not my opinion of the lifes work of the most dedicated hd nuts that ever existed.
thru the pm's i get from other members-- its obvious that quite a few feel the same. i like to think that tribute form us-- us reg workin guys-- is what the founders would covet more than any other return their labors brought them.
Every engine should have an oil filter and THERMOSTATICLY CONTROLLED oil cooler. Especially the serious road riders who ride when it takes longer to get dressed than it takes to get where they're going. When I was a year round rider here in the midwest I used to put a longer set of hoses on my oil cooler in the winter so I could zip it up inside my jacket. Just draped it over the handlebars when I parked . Keep me and the oil warm.
Cold oil does not lubricate roller bearing engines as it should.