Out of curiosity, at what sort of mileage do you change the lifters at?
The lifters start to take excessive time to pump up around 6,000 miles, like clockwork. I take that as a sign... Upon replacement, the lifters I have removed most all have developed excessive roller looseness, both axial and radial, which I attribute to roller bearing wear. The brand of lifters make no difference. SE, Woods, S&S, ect all have shown the same result. For what it's worth, most of the miles on this bike are extended trips, usually in the Rocky Mountains riding two up pulling a Bushtec. So high elevation, often high temperatures pulling a reasonably heavy load. I run Mobil 1 V Twin. I run a Jagg 10 row fan assisted oil cooler and I run thermostat controlled fans on the cylinder heads, so I control oil temperature as much as possible. And I have tried several cams with various lift and gentle ramps in an effort to reduce lifter strain. I have tried various valve spring types and pressure. I have run the stock cam plate and oil pump, the stock cam plate and Thayer 3 stage oil pump, and the newest S&S camplate and oil pump. All variations result in the same premature lifter wear, causing me to change lifters about as often as I change oil. I am convinced this design has a basic oiling deficiency built into the design... I decided a long time ago I would not buy a new bike until this design motor was replaced my the MOCO. Unfortunately, the new design motor seems to have issues of its own. Issues I prefer to not experience first hand.