Mike Rocket
Rocket 3
Cam tensioners started out with spring tensioners. Then the aftermarket folks introduced gear driven. Which is Ok but the run out on the pinions ate the gears. Harley came out with the hydraulic system which works rather well but still requires a check at or around 40,000 miles. Inner pad wears first for some reason. The primary automatic tensioner on the Twin cam has been a problem since day one. Way to tight. Primary chain tension ends up eating the bearings. I believe Harley quit using the automatic tensioner on the newer modals but did not leave a window in the primary case to make adjustments on manual tensioners. This results in removal of primary case to make adjustments to primary chain tensioners. Unlike the older models that had a window for such adjustments. 103 models had a real problem with there stators. Harley up graded the stators quickly due to the fact that they were going out while the bikes were still under warranty and was costing them money. The motor compensater was a left over from the 88 cubic inch and worked well on the 96 cubic inch but when they went to the 103 it did not. Later model 103 cubic inch acquired the Screaming eagle compensater but just by design was not getting the proper oil coverage. Harley redesigned and still had problems. Baker an aftermarket company that deals with Motor compenstater and primary tensioners for Harley's makes some quality products that work. Very expensive but American made. Don't get me wrong. Not bashing Harley's but do know the weak points of the twin cam. I work on them a lot. Every new engine design from Harley has resulted in problems. Starting to get folks showing up wanting work done on there Milwaukee eights. So we are still in a learning curb but it has become very apparent that this motor is no exception. It has it's problems. Knowing what I know I tell them sorry take her to the dealership. If I were in the market for a new Harley I would wait a year or two and let the company work the bugs out. I'm sure that once Harley has the chance to figure it out and make the Necessary changes the Milwaukee eight will be a engine that shines.![]()
Thanks for the information