Why is this the " 2017 and up M8 Air and Liquid Cooled discussion"? I thought the Limiteds were liquid cooled and the others "oil cooled." I know both rely on air cooling as well, but isn't the basic distinction oil vs liquid?

Not trying to be a smart ***. Just want to make sure I'm understanding correctly.

 

If it's an M8 it's welcome !

 

Where is studied, oil was considered a liquid.

So, I think we're all good.

 

Milwaukee Eight (M8) is good enough forum name. Water, ****, beer, oil whatever.

 

So, are there 2 diff 107's or not?

 

Yes, there are.

For the 2017 models some were "Twin Cooled", and some were only air (oil) cooled.

For 2018 the Twin Cooled are gone, and all are air/oil cooled.

 

That can't be entirely correct. My 2018 Limited is liquid (not oil) cooled. That's the point of my question to begin with. Trying to confirm that there is an oil cooled 107 and a liquid cooled 107.

 

Yikes, I stand corrected!

Haven't been following the new models closely, because I'm not in the market for a new bike. I though the Twin-Cooled didn't continue to the '18 line.

All of the '18 Softails are air/oil cooled only, all of the Touring EXCEPT the Ultras, are air/oil cooled only. Ultras are still Twin-Cooled. SOME of the CVO's are one or the other.

So, yes, there are still both.

 

In 2018 only the Limited is twin cooled (both regular and CVO versions). In 2017 a couple of more models were.

The biggest difference between an Electra Glide and the Limited is the Limited is twin cooled whereas the Electra Glide is air cooled. There are many other differences of course but that is the main thing that stands out.

 

Okay, here is an article I found on cycleblog.com from Aug 31 of last year. I think this is what I've been trying to confirm:

Since the 2017 Harley models were released last week, most of the questions I’ve gotten about them relate to the motor’s cooling systems. Some models are dual liquid cooled, using both coolant and oil while others are only oil cooled. Both also rely on air flow to assist with cooling. This has created some confusion on the matter.

To clear things up let me explain. Any 2017 factory model with fairing lowers is dual cooled. This includes CVO Street Glides, any Ultra model and Tri-Glide Trike models.


The fairing lowers on these bikes house coolant tanks and radiators. A water pump sits below the voltage regulator at the front of the bike. It pumps coolant through lines that feed into the cylinder heads, around the exhaust valve guides and then back out of the head, returning to the coolant tanks. The system is well hidden and not noticeable unless your looking for it. Harley Dual cooling has been around since 2014 but in 2017 the pump was upgraded and is now a variable speed, electronic pump controlled by the ECM. It does not use a thermostat.


The remaining touring models, Street Glides, Road Glide Customs, Road Kings, and Free Wheeler Trikes, are not dual cooled. They depend on oil and air flow to keep the motor cool. Because these bikes rely so heavily on oil for cooling they have a high output oil pump with larger gears then the water cooled models. Oil is pumped out of the cam compartment, via external lines, towards the top of the motor. From there it enters the cylinder head, is channeled around the exhaust valve guides and then back out of the head and to the return side of the oil pan creating a stand alone oiling system for the heads.