The 2021 harley davidson custom 1250 didn't just show up to the party; it essentially kicked the door down and announced that the old ways of doing things in Milwaukee were officially over. For years, people had been pigeonholing Harley-Davidson as a company that only knew how to make heavy, chrome-laden cruisers for a specific, aging demographic. Then this bike happened. Technically, we now know it as the Sportster S, but when those early images and prototypes started circulating as the "Custom 1250," the hype was real—and for good reason.
It's funny to look back at that launch year because it felt like a massive gamble. Harley was moving away from the air-cooled, low-revving engines that defined them for a century and leaning into liquid-cooled, high-performance tech. If you're a purist, it was a lot to swallow. But if you're someone who actually likes to twist the throttle and feel something happen immediately, the 2021 model was a breath of fresh air.
A Power Plant That Means Business
The heart of this machine is the Revolution Max 1250T engine. Now, if you're used to the old 1200 Evolution engines found in the classic Sportsters, you're in for a shock. The 2021 harley davidson custom 1250 isn't just a little faster; it's in a completely different zip code. We're talking about 121 horsepower and 94 lb-ft of torque.
The "T" in the engine name stands for torque, and they tuned this version of the RevMax specifically to give you a massive shove right in the middle of the rev range. You don't have to wait for the power to build up. You just crack the throttle in second gear, and the bike tries to leave your hands behind. It's got variable valve timing, which helps keep the power delivery smooth across the board, making it feel way more refined than any Sportster that came before it.
What's even more impressive is how the engine acts as a stressed member of the frame. By bolting the front and rear subframes directly to the engine, Harley cut out a ton of weight. The bike weighs in at roughly 500 pounds wet. For a Harley, that's practically a featherweight, and you can feel that lightness the second you lift it off the kickstand.
That "Love It or Hate It" Styling
Let's talk about how this thing looks, because the 2021 harley davidson custom 1250 is anything but subtle. It borrows a lot of visual cues from the world of flat-track racing. You've got that high-mount exhaust that screams XR750, a fat front tire that looks like it belongs on a tractor, and a slim, single-seat setup.
The headlight is a rectangular LED unit that looks like something out of a sci-fi movie. It's polarizing, sure, but at least it isn't boring. The bronze finishes on the engine covers give it a premium, custom-shop feel right off the showroom floor. I've talked to plenty of guys who think the fat front tire ruins the handling, and I've talked to others who think it's the coolest thing Harley has done in decades. Personally? I think it gives the bike a muscular, bulldog stance that's hard to ignore. It looks like it wants to pick a fight with every stoplight it encounters.
Modern Tech for the Modern Rider
One of the biggest shifts with the 2021 harley davidson custom 1250 was the inclusion of electronics that actually work. Gone are the days when "tech" on a Harley meant an odometer and maybe an ABS light. This bike came packed with a 4-inch round TFT display that looks classic but acts modern. You can hook your phone up to it via Bluetooth for music and navigation, which is a nice touch for those longer Sunday rides.
But the real meat of the tech is in the ride modes. You've got Sport, Road, and Rain modes, along with two custom slots where you can dial in your own settings. It changes everything—the throttle response, the engine braking, and the level of traction control. If you're riding in Sport mode, the bike is twitchy and aggressive, exactly how a performance cruiser should be. If it starts pouring, Rain mode softens everything up so you don't accidentally spin that massive rear tire into a ditch.
It also features a six-axis IMU (Inertial Measurement Unit). That's a fancy way of saying the bike knows if it's leaning over. Because of that, the ABS and traction control are "cornering-enhanced." If you have to grab a handful of brake while you're leaned into a turn, the bike helps keep you upright instead of washing out. For a brand often accused of being stuck in the past, this was a huge leap forward.
What It's Like to Actually Ride
Riding the 2021 harley davidson custom 1250 is a bit of a workout, but in a good way. That fat 160-series front tire means you have to give the handlebars a bit of a shove to get it to tip into a corner. It's not a flickable sportbike, and it doesn't pretend to be. It's a power cruiser. Once you get it on its side, it feels incredibly stable, but it takes some muscle to get it there.
The suspension is a bit of a mixed bag. The rear travel is pretty short—only about two inches. If you hit a pothole at 50 mph, your spine is going to know about it. Thankfully, the rear shock is adjustable, so you can tweak the preload depending on how much you weigh or if you've eaten too many burgers lately. The front inverted forks do a great job of soaking up the smaller stuff, though, and they provide plenty of feedback so you know exactly what that front tire is doing.
The ergonomics are "feet-forward," which is standard cruiser fare. However, if you're used to mid-controls, it might feel a bit weird to have your legs stretched out while you're trying to ride aggressively. Harley does offer a mid-control kit, which I think is a must-have if you're planning on taking this thing through the twisties regularly.
Why It Was a Necessary Risk
Harley-Davidson knew they couldn't keep making the same bike forever. The 2021 harley davidson custom 1250 was their way of saying, "We can do performance, too." It was a bridge between the classic heritage of the Sportster name and the future of liquid-cooled performance.
When you look at the competition—bikes like the Indian Scout or even some of the European power naked bikes—the Custom 1250 finally gave Harley fans a way to keep up without having to buy a completely different brand. It's a bike that demands attention. It's loud (not just in sound, but in design), it's fast, and it's surprisingly smart.
Finding One on the Used Market
If you're looking for a 2021 harley davidson custom 1250 today, you're likely going to find some pretty good deals. Since this was the first year of the new generation, some riders bought them out of curiosity and realized they preferred the slower, thumpier feel of the old air-cooled bikes. Their loss is your gain.
When checking out a used one, pay attention to the software. Make sure the previous owner kept up with the firmware updates for that TFT screen and the ECU. Since it's a liquid-cooled bike, you'll also want to check the coolant levels and look for any signs of leaks around the radiator hoses—though these RevMax engines have proven to be pretty stout so far.
Also, look at the tires. That proprietary Dunlop rubber isn't cheap, and if the previous owner spent their time doing burnout after burnout (which is easy to do with 121 horsepower), you might be looking at a $500 bill pretty quickly.
The Verdict
At the end of the day, the 2021 harley davidson custom 1250 isn't for everyone. It's not for the guy who wants a vibrating, chrome-covered museum piece. It's for the rider who wants a Harley that can actually embarrass some sportbikes at a stoplight. It's for the person who loves the brand but wants modern reliability and tech.
It's a rowdy, imperfect, and incredibly fun motorcycle. It has quirks—the short rear suspension and the heavy steering being the main ones—but those quirks give it character. It's a bike that makes you want to take the long way home just so you can hear that RevMax engine sing one more time. Harley took a big swing with this one, and looking back, it's clear they hit it out of the park.