Just wondering if anyone knows is it normal to have the lubrication turn black quickly after changing?
Just wondering if this is a sign of bad piston rings?

 

Wouldn't concern me. Seen this happen many times over the years with older HD's. The way these old flatties sump, you'll probably be changing it anyway.

 

Well if the motor was old and worn I might think that.
But the since it been totally rebuilt 700 miles ago and I noticed after the first 100 miles it seems strange that it’s turn black quickly after a oil change.
I just wonder if anyone else had this happen, or is this the way of the flathead???
Scotties.

 

Depends on who's oil you are using and how dirty the old oil was.

Now I bet I either sent this to an oil thread or a tin man with the latest flushing tool for only 19.99 plus shipping and handling.

Check your compression with a free loaner tool from AutoZone. Be sure it's warmed up and the throttle is wide open. The spark plug wires are grounded and the fuelpump fuse is pulled.

If it is low, do a bleed down test. You can then tell if it's valves or rings by listening for escaping air.

 

Using Valvoline racing oil 50 wt
On a fresh rebuilt motor!

 

Running rich will make the oil black. An engine thats not broken in will make the oil black. A tractor engine in a motorcycle will make the oil black. 700 miles isn't broken in so just ride it after you sort the carb issues in the other thread.

 

The oil in my TWINKIE engine isn't black

 

Its chartreuse like the owners finger nails

 

I'd have a hard time finding the fuel pump, let alone the fuse on a "FLATHEAD".

 

I wouldn't worry about it, but I would switch to 60WT. I like Penn Grade 60, it is green. I use a transmission oil that is red. makes me happy to know which one is leaking, when they leak.

Which is all the time, but nice to know who is the bigger offender. Good luck.