Originally Posted By: MrCPU
Harley parts must be coated in nicotine, or cocaine or something. Especially the ones that get changed a lot.
If you are inferring they are expensive. You are right. But there are few replacements in the market that meet the same specs that are less expensive. Harley Davidson engines are unique in their design compared to other brands and designs (especially automotive designs) they are considered very loose tolerance. They shed lots of metal especially during break-in that automotive toleranced engines do not and therefore require better lubricant filtration to protect them. Every twin cam engine has a pair of cam chain tensioner shoes that are plastic and shed debris throughout the life of the engine. Most require replacement at about 40,000 miles. Believe me you do not want this debris floating around the oil passages in your engine. Therefore, HD specs 5 micron filtration to protect against these types of issues. Like I said before 19 micron might work. But you can buy a 5 micron filter for about $5 more than a 19. Not worth the risk to me.
Harley parts must be coated in nicotine, or cocaine or something. Especially the ones that get changed a lot.
If you are inferring they are expensive. You are right. But there are few replacements in the market that meet the same specs that are less expensive. Harley Davidson engines are unique in their design compared to other brands and designs (especially automotive designs) they are considered very loose tolerance. They shed lots of metal especially during break-in that automotive toleranced engines do not and therefore require better lubricant filtration to protect them. Every twin cam engine has a pair of cam chain tensioner shoes that are plastic and shed debris throughout the life of the engine. Most require replacement at about 40,000 miles. Believe me you do not want this debris floating around the oil passages in your engine. Therefore, HD specs 5 micron filtration to protect against these types of issues. Like I said before 19 micron might work. But you can buy a 5 micron filter for about $5 more than a 19. Not worth the risk to me.