What is the real advantage of 3 different oil sumps? Why not just a single sump?

 

It's HD's design...that's the way they wanted to keep it. i like to be able to use a Automotive type oil in the engine and not having to change the Primary until 10000 miles and the tranny every 20000 miles...is there a real advantage to having a chared box like the Metrics other than using 1 fluid? Not sure either, i have had both and i don't ask, i just ride.

 

The V-Rod only has one hole. Not sure what the advantages are, if there are any.

 

Smaller engine compartment.

 

I had read the same question on italian forum
I think that is an HD's design, too. But 3 holes are better than one when you must changes only one oil... and so you can empty the primary, the motors oil or transmission without emptying them together. I change primary and motors at 8.000 km (I don't know how many mils) and transmission oil at 16000 km

 

Here is the real reason... Harley Davidson Motor Company is aware that most guys refer to their bike as a she. They want the bike to match a woman. Three holes.

 

No advantage.....very old engine design from the 1920's-30's. Most all newer engine designs have shared sumps. Easier to service for sure. My Tbird takes 6 quarts of 10w50 oil and a small black spin on oil filter. Super easy to change oil.

 

Why 3 holes?

That's what she said!

 

 

Even if it's a old design from the 30's doesn't mean it's a bad design...If it was such a bad idea it probably wouldn't have stuck around this long????