Harley-Davidson Ultra Limited (2017) - first ride and review

Harley-Davidson doesn’t come out with a new engine very often, so when they asked if we wanted to fly to Seattle and ride the big new 1745cc or (107ci if you’re American) Milwaukee-Eight air/oil-cooled and liquid-cooled motors in their range of touring bikes, we were on the first flight out to the United States. Here’s our first report.

Harley-Davidson don’t make a new engine very often so when they do it’s a big deal not just for Harley fans, but for motorcycling in general.

And this time round it’s not just a big deal, it’s a big motor too. 58cc bigger than the outgoing Twin-Cam 103 in fact at some 1745cc.

The new Milwaukee-Eight comes in a big 1745cc (107cubic inch) air/oil-cooled option in the new range of touring bikes, or a liquid-cooled 1745cc option for the Ultra Limited and Road Glide Ultra.

Limited edition Central Vehicle Operations, or CVO bikes for short, get a third engine with a massive 1870cc liquid-cooled lump otherwise known as the 114. But for now we’ll concentrate on the 1745cc air and liquid-cooled Milwaukee-Eight engines.

The motor is all-new from the ground-up and gets 11 per cent more torque versus the outgoing 103 Twin-Cam motor which came in at 1687cc. Harley also claim more power but won’t tell us how much, only quoting 112ft-lb of torque at a lowly 3250rpm. While we’re on torque, Harley’s nearest rival to this new engine is Indian’s Thunder Stroke 111 engine makes a claimed 106ft-lb of torque and comes in at 1811cc. But that’s just a claim so we’ll have t get them together in the UK soon to see how they compare.

The motor features four-valve cylinder heads, twin spark fuel-injection system, dual spark plugs, a single chain-driven camshaft, a slipper clutch and better heat management.

The touring range of bikes, which includes the Road King, Road King Classic, Street Glide Special, Road Glide Special, Ultra Limited, Ultra Low, Road Glide Ultra and two trikes, also get new Showa big piston front forks for improved handling, and new preload adjustable emulsion rear shocks.

The seat is cosy and well-padded, the handlebars sweep back and make you feel comfortable the moment you get on the bike, and there’s a huge top box which can take two lids or a massive rucksack with room to spare, and panniers.

But this new bike is all about the new Milwaukee-Eight engine. At tick over it runs at lower RPM, ticking over at 850rpm, instead of 1000rpm. The new slipper clutch means ham-fisted down changes one gear too many don’t result in the rear locking up and chirping at traffic lights, and the liquid-cooled lump doesn’t make your testicles feel like they’re in a microwave when in town.

Interestingly, we rode an air-cooled Ultra 107, and a Road King Classic too (pictured below) and they appeared to run cooler in town traffic too thanks in part to Harley’s engineers and their precision oil-flow around the cylinder heads. The rear exhaust is repositioned away from the rider, as is the exhaust catalyser too. It means the whole experience is much cooler in town for rider and pillion. And, when the old bikes used to get hot and bothered the gearbox became hard to select gears and the clutch became grabby. I didn’t notice any of that on the new engine, either air/oil cooled or liquid-cooled.

In truth, apart from the cooling and a slight bit of extra smoothness and refinement I noticed, it’s hard to tell the difference between the new liquid-cooled motor and the air/oil cooled motor once out of town. They both respond well, and you can feel a definite increase in torque around 2500rpm.

Harley claim the 107ci motor will be two-to-three bike lengths ahead of the old 103 motor at the traffic lights in the 0-60mph sprint, and around one or two bike lengths ahead when it comes to roll-on. I’d back that claim.

What’s not been lost is any of the character of the motor. It still vibrates just enough in its rubber-mountings, and has that trademark Harley potato-potato sound. If anything the sound if richer. A lot of that is because the new engine runs quieter than the 103 Twin-Cam, meaning you hear more engine noise. It may not have quite the air intake induction noise of the old bike, but more than makes up for it with louder exhaust notes.

You can ride it lazily and it pulls cleanly. But it’s in the mid-range where you’ll notice the new motor most. At around 2500rpm the bike is doing 55mph in top gear, and when you twist the throttle it definitely feels smoother, more lively and more willing to overtake. The old bike would have needed a down change to get a similar response from the motor.

Generally, you don’t have to work the motor as hard, the bike’s torque now does it for you and makes one of the best big tourers now even easier to ride. It’s lazier and more comfortable for it.