I had a lifter "collapse". (I will add a picture from my 'phone but I hate trying to type on the tiny screen...)
I went to change the oil filter (no, I have not started the bike since replacing the lifters) and there are metal flakes (magnetic, bright shiny steel colour) in the filter - lots of it.

Please advise what I should do next.

Thank you, in advance.

 

Ride the bike. That's what I would do. The filter did it's job. Any damage is already done, so it's either all going to be OK or it's not. You might consider changing the filter at a shorter interval for a time or two.

 

It really depend on how badly worn the lifter was, and how long. What does the cam lobes look like? Since you pulled the lifters out, I would open up the cam chest to inspect, then you will know if you can clean it out and do what Dr. Hess suggested. This is a tough call. Some guys will tear the motor apart and clean, and others will try to clean out as much as possible and hope that nothing got into the crank. I gambled and lost on this one. I might be bias on the pulling everything down and do a thorough cleaning, and if there are a few miles on the bike, it would be a cheaper refresh then new engine.

 

What exactly is a "collapsed lifter" that produces that much metal and not take out something else?
I'm a fan of pulling the oil pump and cleaning out all the passages, asI have seen it get built up in the corners of the galleys.
Additional inspection depends on what you find.

Griz

 

I'd want to know if the lifter was a cause or a symptom.

 

Hate to be the bearer of bad news, but I suspect the lifter is a symptom and you've got more problems. Take the oil screen out and check is easy. I bet if you remove the cam cover, the cam chest will be full of metal...

 

Just to be safe I am going to pull open the “nose cone” and take off the oil pump.

The oil pump is an S and S and I want to clean it out and check it to be safe.

I ran a magnet on a flexible extender around the oil tank and no metal filings.

The filter did not have a lot a lot of miles on it.

I was just not expecting to see the metal.

The lifter had had been ticking for a while, then it got louder and louder (trying to ride home on the highway) then very loud and then the engine stopped. I trailered it home.

The tappet screen was perfectly clean.

 

Hopefully the oil filter captured everything…..but, inspecting the cam chest would be a good idea.

I’m assuming everything is stock since the rivets are still there. If that is the case, at least change out the cam bearing to the Torrington. Also a good time to change the cam if you’re interested, but maybe required if damage occurred.

But, if you’re on a budget…..stick to what Dr. Hess said.

 

I am always on a budget (young children).

It looks stock, but isn’t. There’s a cam with Torrington.

I use Twin Cam oil filters for the extra filtering.

 

The EVO oiling system is not designed to run Twin Cam oil filters. I would not run them on my bike.