BMW K1600 Explained: The Inline-Six You Can Still Buy New (and Why Riders Argue About It)

Ask a room of motorcyclists about inline-sixes and the same three names come up: the Honda CBX, the Kawasaki Z1300 and the Benelli Sei. All three are collectible, and a clean one can cost five figures. So it is odd that the modern version barely gets mentioned, even though you can still order one from a BMW dealer.

The BMW K1600 has been on sale since 2011, makes 160 horsepower and sounds like nothing else in the parking lot. The K1600 also has an unusual front end, a speed limiter that launched a thousand forum threads, and a federal investigation in its past. Here is what the K1600 really is, what is fact and what is folklore, and what it teaches you about loading any heavy touring bike. (BMW writes the name “K 1600,” but most riders search for “K1600,” so we use that here.)

Smoothness is the short answer. In an inline-six, the pistons work in three opposing pairs, so the up-and-down forces and the rocking motions cancel each other out. A twin can cancel the shake but leaves a rocking motion. A four cancels the big forces but leaves a secondary buzz at higher revs. The six is the layout that leaves almost nothing behind, which is why the K1600 feels so calm at highway speed.

The catch is width. Six cylinders in a row make an engine that is wide, thirsty and expensive to service, and it can scrape the pavement at deep lean angles. That is why sixes stayed rare. Honda eventually turned its CBX into a fairing-and-saddlebag tourer, which tells you where the layout was always happiest.

BMW claims it is the narrowest inline-six in series motorcycle production. It measures just 555 mm across and weighs 102.6 kg (about 226 lb). Displacement is 1,649 cc, which happens to match the displacement limit of a modern Formula 1 engine, although F1 uses a turbocharged V6, not an inline layout.

Current K1600 engines make about 160 hp at 6,750 rpm and 180 Nm (132.7 lb-ft) of torque at 5,250 rpm. Torque arrives low and stays flat, so the K1600 pulls cleanly in sixth gear without a downshift. That is what you want from a bike built to cover 500 miles in a day.

Because Honda already owned the “relaxed giant” space with the Gold Wing, and BMW could not win by copying it. The K1600 had to feel lighter and sharper than its size suggests, and that mix of size and agility is the whole pitch. If you want the competitor’s side of the story, our look at the Honda Gold Wing’s Golden Jubilee updates shows how Honda kept its flagship fresh.

It also helps to know which kind of rider each bike suits. Our guide to the adventure bike vs touring bike debate covers that choice, and the K1600 sits firmly on the touring side: heavy, fast, quiet and built for two.

Instead of telescopic forks, the K1600 uses Duolever, a double-wishbone design in the Hossack family. Two wishbone arms link the front wheel carrier to the frame, and a single spring strut handles the suspension work. BMW introduced the layout in the mid-2000s on the K 1200 S and refined it for the K1600.

The big benefit is resistance to brake dive. On a normal fork, hard braking compresses the fork tubes and the nose drops. With Duolever, braking forces push along the arms instead, so the K1600’s front end stays level, and the wheel moves nearly straight up and down instead of on a diagonal, so it needs less clearance in the wheelbase. That lets BMW keep the bike compact. Rider magazine’s test of the Grand America found that it carves corners with confidence despite its length and weight.

The trade-off is feel. The steering link works differently from a fork, so the bike rewards a rider who understands countersteering on a motorcycle. If steering ever feels odd on any bike, our guide to why motorcycle steering feels heavy is a good first check.

The cap is real. BMW announced the Grand America at EICMA in November 2017 and limited its top speed to 162 km/h, or 101 mph, “based on the principle of the American Way of Riding.” Rider magazine verified the limit by GPS, and noted that the cap does not apply to other K1600 models.

BMW’s own press release gave a more practical hint. It acknowledged that adding rear equipment, a popular habit in this segment, can significantly change a bike’s characteristics, and the Grand America ships with a large top case. RideApart’s take was blunter: a top case changes wheel load distribution and can hurt stability, so BMW should simply have said so.

One myth is worth clearing up. The limiter was part of the launch, in late 2017. NHTSA opened its investigation in March 2019, so the cap was not a reaction to it.

On March 25, 2019, NHTSA’s Office of Defects Investigation opened Preliminary Evaluation PE19-002 on 2018 and 2019 K1600 motorcycles, a population of 3,041 bikes. The issue was steering oscillation, or “front end wobble,” at highway speeds or while decelerating. The agency started with six consumer complaints, then upgraded the case to an Engineering Analysis (EA19-003) that would examine the bike’s geometry, suspension and other characteristics.

Opinions among riders split. Rider magazine reported that the K1600 B felt rock-solid on a cross-country test, then noticed some straight-line unsteadiness on the GTL and Grand America. Some K1600 owners on BMW forums report no wobble at all, even in strong crosswinds. We could not find a recall that came out of that analysis, so check NHTSA’s database for the latest status on your VIN.

Most high-speed instability on any heavy bike traces back to tire wear, tire pressure, loose steering-head bearings or an unbalanced load. That is why the next section matters more than the headlines for any K1600 owner. And if you enjoy stories about risky rides, our roundup of the most dangerous motorcycles ever produced puts the K1600 debate in context.

You will hear riders say that shaft-driven tourers drift slightly to one side when you let go of the bars. The K1600 uses a shaft final drive, and shaft-drive bikes can show torque reaction, sometimes called shaft jacking, when the throttle opens suddenly. RideApart notes the effect varies a lot from bike to bike, and some riders never feel it.

We could not find BMW confirming a one-sided drift on the K1600, so treat that as owner folklore until you test ride one. For the bigger picture on shaft versus chain, see our list of the best shaft drive motorcycles.

This is the lesson that applies to every rider. BMW’s own press release linked the Grand America’s speed cap to the popularity of rear-mounted accessories, which tells you how much load position matters on a bike that weighs close to 800 pounds. Your bags change the way your bike steers, brakes and tracks at speed, and the K1600 is no exception.

A few habits help on any touring motorcycle:

• Pack heavy items low and close to the frame, not high or far behind the rear axle.
• Balance the left and right bags so neither side is noticeably heavier.
• Keep the top case light, since weight up high and behind the axle has the biggest effect on stability.
• Adjust tire pressure for the load and check it before a long trip.
• Respect the bike’s maximum load rating in your owner’s manual.

The K1600 ships with BMW’s integrated cases, so for K1600 riders this is a loading lesson more than a shopping one. If your bike is not factory-bagged, our motorcycle luggage range covers saddlebags, trunks, sissy bar bags and more, with mounting styles like quick-disconnect, hard mount, throw-over and shock cutout.

To plan the packing itself, read how to pack a motorcycle like a pro. If you are weighing bag styles for a solo trip, our comparison of saddlebags vs tail bags breaks down capacity and weight balance. For the road itself, these tips for long distance motorcycle riding are worth a read.

Used K1600s are far cheaper than new ones, but every K1600 deserves a careful inspection. For reference, 2022 base prices were $23,895 for the GT and $26,895 for the GTL, so check current listings for real market prices. Before you commit to any K1600, run this checklist:

1. Run the VIN through NHTSA’s recall lookup. Known actions include a January 2022 recall of 2019 and 2020 K1600 GT, GTL and B models over a rear link strut, a February 2024 front spring strut recall on a small batch of 2024 bikes, and a 2026 recall covering about 9,160 U.S. bikes (2017 to 2025) over the reverse-gear control unit.
2. Ask for service records. Six cylinders mean more work at valve checks, so get a quote from a BMW dealer before you buy.
3. Test the electronic suspension. Dynamic ESA should adjust cleanly with no warning lights.
4. Inspect tires and steering-head bearings. Uneven wear or notchy steering is a red flag on any heavy bike.
5. Ride it at highway speed, ideally with a passenger and luggage, the way you will actually use it.