2021 Road Glide vs. '13 F6B

[Az Wingrider]

The Milwaukee 8 was a racing motor, never designed to deal with EPA restrictions, they'll never fix it.

The Milwaukee 8 is not and never was a racing motor. It is an evolution of the traditional Harley V-twin. The Twin Cam it replaces was a evolution from the Evo and so on all the way back to the Knucklehead. As a result of more efficient combustion and relocation of the catalytic converter the exhaust temps were lowered by 100 degrees.
The last Harley motor with 4 valves per cylinder was the V-Rod, before that the only 8 valve motor Harley produced was the 1916 Model 17 racing motorcycle.

[taxfree4]

The Milwaukee 8 is not and never was a racing motor. It is an evolution of the traditional Harley V-twin. The Twin Cam it replaces was a evolution from the Evo and so on all the way back to the Knucklehead. As a result of more efficient combustion and relocation of the catalytic converter the exhaust temps were lowered by 100 degrees.
The last Harley motor with 4 valves per cylinder was the V-Rod, before that the only 8 valve motor Harley produced was the 1916 Model 17 racing motorcycle.

Somebody better tell Harley because they're using it for King of the Baggers racing series. And as far as efficient combustion take a look at a engine tear down after just 500 miles of this engine, they're on YouTube. Every engine Harley ever made is an "evolution" of the previous engine so I don't see the point.

[Verismo]

Every engine Harley ever made is an "evolution" of the previous engine so I don't see the point.

Not technically true. They were commissioned during WW2 to design and make an engine that could hang with the Germans and basically copied the design from BMW. They called it the XA. It was a flat twin and shaft driven, and ran about a hundred degrees cooler than the V due to the fins being out in the air. But God forbid Harley stick with an efficient and long lasting design, so they discontinued them after the Army leaned more into the Jeep, and only a thousand of them were made.

Jason

[Az Wingrider]

Somebody better tell Harley because they're using it for King of the Baggers racing series. And as far as efficient combustion take a look at a engine tear down after just 500 miles of this engine, they're on YouTube. Every engine Harley ever made is an "evolution" of the previous engine so I don't see the point.

King of the Bagger racing is for production motorcycles with production motors. Very few modifications are allowed. The Milwaukee Eight motor is a 45 degree, air cooled, pushrod V twin motor with a flat plane crank. As I said previously it is based on the Knucklehead that was introduced in 1936, It wasn't a race motor in 1936 and is not a race motgor now. Harley has made much more technologically based motors that would have been far better race motors. The new Revolution Max engine is a 60 degree, water cooled, overhead cam, V-twin with a split plane crank and a 9500 rpm rev limit. If Harley wanted to build a race motor this is current technology.

[taxfree4]

King of the Bagger racing is for production motorcycles with production motors. Very few modifications are allowed. The Milwaukee Eight motor is a 45 degree, air cooled, pushrod V twin motor with a flat plane crank. As I said previously it is based on the Knucklehead that was introduced in 1936, It wasn't a race motor in 1936 and is not a race motgor now. Harley has made much more technologically based motors that would have been far better race motors. The new Revolution Max engine is a 60 degree, water cooled, overhead cam, V-twin with a split plane crank and a 9500 rpm rev limit. If Harley wanted to build a race motor this is current technology.

Again, since the revolution max is not yet on any production motorcycles they're using the Miluakee 8...for racing. Doesn't change anything I stated. I could look up the specs myself, for what, the fact remains that's the engine they're going with.

[Az Wingrider]

Again, since the revolution max is not yet on any production motorcycles they're using the Miluakee 8...for racing. Doesn't change anything I stated. I could look up the specs myself, for what, the fact remains that's the engine they're going with.

The Revolution Max is in both the Pan American and the Sportster S

[taxfree4]

The Revolution Max is in both the Pan American and the Sportster S

Again, so then the Milwaukee 8 is the motor to race with in the King of the Baggers because for whatever reason they didn't put it on a bagger, you answered your own question.

[Az Wingrider]

Again, so then the Milwaukee 8 is the motor to race with in the King of the Baggers because for whatever reason they didn't put it on a bagger, you answered your own question.

I did answer that question several posts ago. The King of the Baggers racing series is for production motorcycles with stock motors. The Harley Davidson FL series of motorcycles (Baggers) are only offered with the Milwaukee Eight motor so that is what they must race in that series. It is a production motor not a race motor.