That would definitely be the first thing check, run out..
If it's still under 0.006" I would say it's good but take a look at the camp plate as well and make sure that where the pinion shaft rides isn't worn out.. You will see a lip starting to build on the outside of the plate.. The wheels might still be good but oil pressure is the key here..

Didn't know anybody could get that kind of mileage out of a twin cam that's pretty impressive..

 

I will. I have a dial indicator and a 135 pound magnetic base, but I couldn't seem to orient the dial indicator properly on the pinion shaft. I was using the cam bearing plate from Georges Garage inner cam bearing installer. It just wasn't working for me. So I ordered a Feuling Crankshaft Runout and gear drive backlash measuring tool #9015 today.

I also decided to pickup a new primary cam drive chain, secondary cam drive chain and the fastener kit.
Part numbers:
25585-06 Camshaft Chain & Fastener Kit
25683-06 Secondary Cam Drive Chain

My local HD dealer (12 miles away) didn't have the above (2) parts in stock. Non of the other fairly local HD dealers (4 of them) had it in stock. Found a HD dealer about 60 miles away, had them actually pull the parts to verify and picked the parts up today. To my surprise, I see on the counter the now common notice "3.4% charge for using a credit card". I was happy they had the parts I was looking for but upset that I didn't have enough cash with me. Counter person asks if I'm a veteran or in the military, They offer a discount if you are, but I don't qualify.
I jokingly mention that I'm a national HOG member (I am), and the counter person says, "that works", and I get a 10% discount, which softened the credit card surcharge.
Being a national HOG member, yea, I got that going for me

 

Unfortunately, twin cam parts are now becoming N.O.S. at most dealerships. I've been working on a 2011 Electra Glide Classic. It certainly doesn't have your's kind of mileage. Impressive. Harley's Genuine Harley-Davidson OEM Service Parts website has been invaluable.

 

I made a bracket that bolts to the case to mount the dial indicator..
I try to save money when i can..
If the pinion shaft run out checks out ok, You should be good to go. Is that a groove in the shaft? Can you feel it with your finger nail or knife?
By what I can see it looks as if the oil pressure started getting low. You can see the how the condition of the pinion shaft at the oil port looks good but outside that 1/4" path you can see scoring and a little heat build up which to me would indicate lack of good il pressure.
I would definitely get a Fueling oil pump or possibly an S&S with cam plate. I know they're a bit pricey but I really like the idea of the bushing in the S&S. I think it's a much better design.

 

Very true!
HD #25683-06 Secondary Cam Drive Chain --> The part I picked up (only one the dealer had) had a special order label on it with a date of 08/13/2015!

HD #25585-06 Camshaft chain and fastener kit --> The part I picked up (only one dealer had) had a date of 05/21/19 on the bag

 

I'm the same way. Unfortunately I'm under a bit of a time constraint since I'm supposed to lead a 4-day ride with 6 friends in less then two weeks. I went with the Feuling product since Amazon said it would arrive at my house in two days. Plus, from the research I've done, it seems to be a popular product. The product from Whoya on eBay seems to be the cheapest crank runout checker I've found.


I'll check it again this evening. I don't believe I can feel any groove with my finger nail.


I've already purchased the S&S cam plate and the S&S oil pump.

 

Perfect...👍👍 On the S$S....

 

With that many miles, many parts will be worn and may fail sooner rather than later. I would do a complete rebuild if it were mine. Maybe reusing some parts still within service limits. OEM parts have served you well. Unless building a high performance motor, many aftermarket parts are not really an upgrade in my opinion. Just different. Except cams and lifters.

 

I hear you. I should have the cylinders honed and rings, pistons and head checked. Unfortunately, I procrastinated and I'm short on time.
Still waiting for my Amazon delivery of the Feuling crank runout measuring tool.
Today I pulled out both cam bearings and removed the lower rocker boxes. The lower rocker boxes put up a fight. Took a few dead blow hammer hits to get them off.
Question: What/how do you recommend removing the gasket debris from the heads?

 

I'd use brake clean on a rag. I've had the stuff peal right off.