Just purchased a new (2016) Heritage Softail, and this bike idles WAY to fast to suit me (1,000 RPM). My older Road King with the Marelli ECM, was able to idle down to 600. Dealer said they couldn't lower it any more. I know there has to be a back door way to accomplish this. This bike has NO throttle cables, strictly "drive by wire" system.

 

950-1050 rpm considered normal. Idle at 600 rpm gets zero oil pressure.

 

I'm starting to understand wireless EFI now. It's so new guys can't ruin their engine with a screwdriver.
Might even make it past the warranty!

 

^This^
Only a fool would attempt to idle @600 rpm. You will beat the crankpin & rod bearings to death.

 

I'm sorry your idle doesn't suit you, but it suits your engine really well. With an idle that low, you'll have next to no oil pressure, and that may even be below the breakeven RPM of your charging system.

Didn't you listen listen to the bike before you bought it?

 

I've experimented with different idle RPM's, altering it through the Power Vision. I've got an oil pressure gauge and at a -100 there's no change to oil pressure at idle. At a -150 you'll see a reduction in oil pressure; at -200 the oil pressure barely registers on the gauge.

If you want to lower your idle, past a -100 is asking for issues; and as Tommy C posted, why beat the crankpin and rods? A Twin Cam isn't a Pan or Shovel...

 

Actually why it's there is the fuel injection system, emissions and such. Of course new, there probably would be no problem but as things get older and different weather conditions, much lower, there would be a tendency for a stall.
It's not the oil. There is plenty of oil for the brief period a Harley idles. In fact, the oil injectors at the cylinders base do not even work till above idle speed to prevent overheating the oil at idle.

 

If you want it to sound right at idle, you're gonna need a carb.

 

There's easier ways to ruin your bike then lowering the idle down to 600 RPM

 

^^^ This

Emissions..emissions..emissions!

And this ^^^