top of page
Writer's pictureChris Meek

Harley-Davidson’s New 135ci Water-Cooled V-Twin: A New Chapter or a One-Off?

Harley-Davidson has long been synonymous with American motorcycle culture, known for their iconic, thunderous V-Twin engines and loyal fanbase. But as times change, even the most storied brands need to innovate. This brings us to the latest development in the world of Harley: the 135ci (2,213cc) water-cooled V-Twin engine, which recently gained attention in the Kruesi Originals V-Blockhead bike build-off series. But what does this new motor mean for Harley’s future? Could it signal the beginning of a new chapter of water-cooled engines that still maintain the classic Harley look and feel, or is it simply an outlier?


The 135ci Water-Cooled V-Twin: Classic Look, Modern Cooling



The unveiling of the 135ci V-Twin, a water-cooled monster, has sparked excitement, but also curiosity. The water-cooled Evolution Max engine, first introduced in Harley’s Pan America and Sportster S models, has already set a precedent. However, while the Evolution Max broke new ground, its high-revving, more complex design and aggressive styling alienated some die-hard Harley purists. Many Harley-Davidson enthusiasts have strong attachments to the traditional, air-cooled V-Twins, especially those with the unmistakable low-revving, torquey character and iconic silhouette.


That’s where the new 135ci engine in the Kruesi Originals build steps in. Unlike the Evolution Max, which has a much more modern, high-tech look, this 135ci water-cooled engine retains a design that more closely aligns with the traditional Harley aesthetic. It manages to incorporate the benefits of water cooling (better performance and efficiency) without losing the classic V-Twin appeal. This delicate balancing act is likely to resonate with customers who love the Harley look but are ready to embrace new technology.


Evolution Max: A Radical Shift or Just the Beginning?


The Evolution Max engine was a huge leap for Harley-Davidson, both in terms of technology and market positioning. As a high-performance, liquid-cooled V-Twin, it powers models like the Pan America and Sportster S—bikes that are intended to attract younger, more performance-oriented riders. It offers higher revs, more horsepower, and better fuel efficiency than any air-cooled engine in Harley's history.


But has it been a big seller? So far, the Evolution Max-equipped models have been moderately successful, with the Pan America earning praise for being Harley’s first real contender in the adventure bike segment. However, the engine’s futuristic design hasn’t entirely won over Harley’s core base. Many long-time fans remain loyal to the classic air-cooled engines and the aesthetic that comes with them. This brings up the question: Can Harley-Davidson maintain its brand identity while continuing to innovate with water-cooled motors?


Why Has Harley Stayed Air-Cooled for So Long?


Harley-Davidson’s reliance on air-cooled engines for the majority of its history is not just a matter of tradition. There are several reasons for sticking with air-cooled designs, the first being simplicity. Air-cooled engines have fewer parts, making them easier to maintain and repair, which is important for many Harley riders who value the ability to work on their bikes themselves.

Another reason is nostalgia. Harley’s air-cooled engines are a hallmark of their iconic style and sound. The throaty, low-frequency rumble of an air-cooled V-Twin is synonymous with the Harley brand, and anything that alters that experience could risk alienating its loyal customer base.

Lastly, regulatory and engineering constraints also played a role. While water cooling offers better thermal management, allowing for higher performance and emissions control, Harley stuck with air-cooled engines for as long as possible to stay true to the brand’s essence. However, tightening emissions standards and the need for more competitive performance pushed Harley to eventually introduce water-cooled options like the Evolution Max.


How Big Can Harley-Davidson Go? Is a 150ci Engine Possible?


With the introduction of the 135ci engine, the question arises: how much bigger can Harley-Davidson go with its V-Twin engines? The 135ci displacement is already enormous, producing tremendous torque. It’s hard to imagine the need for more, but motorcyclists are often drawn to bigger, more powerful engines.


Could we see a 145ci or 150ci V-Twin in the future? Technically, it’s possible, though there are diminishing returns. Larger displacement engines become heavier and harder to cool effectively, even with water cooling. Additionally, increasing engine size could compromise reliability, fuel economy, and maneuverability—important factors for many riders.

In reality, the jump from 135ci to 145ci or beyond might not make much practical sense for most riders. The 135ci engine already pushes the boundaries of what a cruiser needs, offering vast amounts of torque that will satisfy even the most power-hungry bikers. Harley may choose to focus on fine-tuning performance rather than further inflating displacement figures.


Where Does Harley Go From Here?


The introduction of the 135ci water-cooled V-Twin could mark a turning point for Harley-Davidson. By offering a water-cooled engine that maintains the classic Harley aesthetic, the company is showing it can evolve while respecting its past. If this engine proves successful, it might inspire Harley to develop more water-cooled V-Twins that satisfy both traditionalists and performance enthusiasts.


In the long term, Harley-Davidson will need to continue balancing its legacy with the demands of a changing market. Younger riders are looking for modern technology, while the core fanbase wants a bike that feels like a Harley. The solution may lie in engines like the 135ci—a blend of old-school character and new-school performance.

As for the question of how big Harley-Davidson engines can get, it’s less about chasing extreme displacement and more about optimizing the riding experience. While a 150ci engine isn’t out of the realm of possibility, the real challenge for Harley will be creating engines that deliver both performance and the emotional connection riders have come to expect from their bikes.


In the end, Harley’s future likely lies in refining its water-cooled offerings without alienating its traditionalist fanbase. If they can pull off that balancing act, we may just be witnessing the start of a new golden age for Harley-Davidson.



5 views0 comments

Kommentare


bottom of page