So! Why Harley?
Given todays displacement and torque arms race, I dont think they have much of a choice.
https://www.hdforums.com/forum/off-t...rned-legs.html
Now, prior to buying the SGS, I test rode EVERYTHING. Kawi Nomad and Vaquero, Honda GW and the chopped GW, Indian, Vic CC, Star Stratoliner. MOST of those I mentioned were slightly cheaper in price point, with much worse fit and finish. More plastic. Some were water cooled, some air cooled. ALL got hot. The Harley had better looks, feel and was more polished. A ton more option to make the bike mine with options and upgrades, MOCO or aftermarket. Less rattle than some, better ergonomics than most (for me). I would say that when comparing everything about all the bikes I test rode, the Harley most of the time fell into the upper middle of the pack, and surpassed them all in the few areas that concerned me most. That is why I picked a Harley. Being the coolest running or having the biggest engine were not why I picked it, but because it checked off the areas that fit me.
Someday you guys should read up on the Nomad / Vaquero heat issues and go to the Kawi forums. Now those guys were literally getting COOKED for awhile until the found a better way to redirect the heat.
They do force engine designs through regulations. EPA mandates a AFR of 14.7 on motorcycle gasoline engines and Catalytic Converters which in turn makes for one hot running engine and super hot exhaust.
This forces design changes, to best mange heat and keep the rider from cooking off his own exhaust.
Liquid cooling does help manage the lean burn conditions very well, it can be precisely controlled. Air cooled a bit more tricky but HD and Indian, as well as the metrics proves it can be done.
The problem with all model late bikes, weather air cooled or liquid cooled is no matter what method chosen, it does not change the temperature of the hot exhaust gasses.
Exhaust gas temp is about 500 degrees, no matter how the engine is cooled. So we are down to how the bike makers manage and route the heat from the exhaust system to stop the riders legs from cooking at all speeds. Im not sure its possible unless one kills the CATS and puts on an XIED or equivalent to slightly enrich the AFR.
Even so with that done, as I have found out, yes without question it has stopped the calf of my right leg from turning red but one must not think all heat will be gone.
Why do they want to keep pace and not just make 57 Chevys? It's a paradigm shift as well as a shifting demographic. New Harley owners want a bike that is easy to ride, performs well, but retains the HD heritage. The Moco is doing a pretty good job of that and will continue to make better and better bikes while retaining their core value of "heritage". And while they appreciate the old school guys (and they really do), they can't run a business built around guys who want to keep their Evos.
PS - the last air-cooled Porsche was in 1998. Just sayin.
The Best of Harley-Davidson for Lifelong Riders
The reason MOCO was struggling (and struggling is a relative term with stock holders) in 2009 had nothing to do with the air-cooled V-twin engine, it had to do with over production in a bad economy and not shutting down most of the plants to wait for things to turn around. All the other manufacturers had the same problem, but their foreign ownership covered the downturn. But, take note that Honda actually took the Goldwing factory out of the US.
Harley and Indian V-Twins are meeting all present and future EPA regulations. So thats not it. lets consider pragmatically some facts to what is being suggested here: Harley has been the top motorcycle manufacturer in the US for almost all the last 25 years. That means they are beating Honda, Yamaha, Kawasaki, Triumph, BMW, and a few others. Why? What does Harley have that the majority of motorcycle riders want?
Also consider a poll by Harley a few years ago which showed that 8% of Harley owners put more than 1800 miles a year on their bikes. Eight percent! That means 92% of Harleys spend a lot of time in the garage. Why? And lets consider that for their class, Harley is one of the most expensive choices out there. Some folks say all things equal, Harley is competitive. Yea their competitive, at the high end of the market. An Ultra is a $30,000 motorcycle. Who else sells a $30,000 touring bike? Well Honda and BMW if you get all the bells and whistles. Indian happens to have a $30,000 pretty much out of the box. Why are folks paying that kind of money for a silly air-cooled V-twin that is hot to ride and on the slow end competitive wise?
So with all the wonderful water-cooled BMWs, Goldwings, Triumphs: why is the air cooled V-twin dominating the market?
Im trying to be pragmatic. Harley may well eventually build a water-cooled engine, but it will be very very risky because the vast majority of Harley owners bought the bike for the air-cooled v-twin. Including me. Once Harley commits to water-cooled, what sets them apart with the others? Nothing. Except for Indian, the Indian forums are just giddy because they think their motorcycle is going kick Harley around in the market. They have the right bike, they just need some leverage, like Harley giving up the air-cooled V-twin.
Honestly, Im a motorcycle guy. I like most motorcycles, not just Harleys. But I do like the nostalgic style bikes that appeals to all my senses and my soul as well. I have an Yamaha FJR I ride for speed and performance, I ride my Harleys (I have two), Im at peace. And I think that is why most Harley riders pay that premium price for a bike that doesnt perform quite as well as the much cheaper metrics.
So I ask, if Harley gets rid of the water-cooled V-twin, why would you own a Harley? Me right now, I wouldnt. I would keep my trusty Evo that makes me smile every time I pull the choke and fire her up. I will probably keep my comfortable 09 RKC because it is the one bike my wife will ride with me and it is fun to add chrome. But, if Harley goes water-cooled, I see an Indian in my future.
Beary
The last emissions standards for large motorcycles went into effect in 2010. Harley met those. There are no impending later standards, nor are there any draft revisions in legislation.
Basic engineering, a water cooled engine has a more uniform combustion chamber temperature and more power and performance can be gained via a water cooled engine than via an air cooled engine. This is the basic reason so many dirt bikes and such went water cooled. Yes, the engine is heavier and more complex. The power gains outweigh those penalties in the minds of the manufacturers and most riders.
The latter is the primary reason I can see Harley ultimately going water cooled, while doing everything possible to keep the illusion of being air cooled. Harley is about at the limit of performance for an air cooled engine. Resultingly, Harley is at the back of the pack when it comes to power and performance when compared to the other heavy cruisers on the market. This performance gap will expand as long as Harley stays air cooled.
While there are still manufacturers of air cooled motorcycles, IMZ-Ural, Royal Enfield, these are niche market bikes, occupying a tiny portion of the overall motorcycle market. I do not see Harley having any desire to relegate themselves to niche marketing.











