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Kawasaki and Triumph are way out there on heavy-weights.
...gene
Yep, my old 2005 Vulcan 2000 was 125ci's of pure meanness. It was also a good looking engine at that, complete with the dual external push rods that are so Harley'esque in appearance, unlike Yammie's single tube version. There's no reason why Harley can't produce a much larger displacement engine with liquid cooling.
I'd love to have that much motor/power on my Roadie.
That said, I won't buy the first year liquid cooled Harley. Learned my lesson with the '07 SG. Same reason I don't run out and install the latest/greatest OS on my PC's. I'll wait a year and let the bugs get worked out in the public "beta testing".
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.
Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.
Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.