I have a 2015 FLHTK that is going to hit the 50,000 mile mark on my next service around it’s 3 yr birthday. I’m wondering what if anything needs to be inspected or replaced on the engine to keep it healthy. I’ve been running Mobile1 V-Twin, Primary+ and Bel-Ray 85/140 since new. Runs and sounds like a new bike just want to keep it strong for another 50,000 and yes my goal with this bike is 100,000+ miles.

Change the fuel filter if it hasnt been changed in the last 20,000. The plugs if over 25,000. But honestly you shouldn’t need anything else besides what’s been mentioned

Regular maintenance has always been up to date or ahead of schedule. That’s not what I’m concerned about. The manual didn’t tell me to change the wheel bearing but that has been done twice, the manual did not tell me to change the compensator but that has been done twice also. I’m looking for weak points that will fail on the engine that can be prevented if caught in time. I don’t want to be across country and boom it goes.

Fuel filters are $20. Also the early fuel filter shells are known to crack and lose pressure. I have been stranded once and had to limp home at low speed another time. They are a 30 minute quick change and good piece of mind.