Differing from other cruisers under the Boulevard banner, the M109R uses a 54-degree layout for its V-twin, not the normal 45-degrees. (Photo: Nelae Bayly) » More Photos

At 1783cc, the new engine is not the largest, but Suzuki is claiming it to be the most powerful V-twin in the world. Producing 127 horsepower at 6,200 rpm, and 118 ft. pounds of torque at 3200 rpm, it has got the Kawasaki Vulcan 2000 and the new Yamaha Roadliner beat by a few that's for sure. It just doesn't out torque the Vulcan, although not much does. With the simply massive 112mm pistons blasting up and down their individual 90.5mm strokes, the engine will rev till to 7400 rpm before the limiter shuts things down. Maximum power is quoted at 6,200 rpm, but the bike still keeps pulling solidly till 7000 rpm if you need.

During our test I heard one journalist from a well-known glossy publication complaining about the bike's bland power delivery, and have to disagree. The compact engine is the jewel in the M109R's crown, and our esteemed scribe to me is mistaking smooth, for bland. Producing power anywhere in the range, there is never a second's hesitation when you twist the throttle, and the bike pulls from just a few rpm off idle with absolute authority all the way to red line. If you crack open the throttle hard with the big pistons thumping at four grand there is a more feral growl, and you feel a deep, mellow vibration in your gut as you hurtle forward at an extremely rapid pace. Then, rolling off from higher rpm as you shift down through the gears gives the most wonderful sound from the pipes as the engine slowing rapidly. Great stuff. Talking with engine engineer Yutaki Nitta, the pulsation I felt from the engine is a deliberate move to give the M109R character, and after three years developing the new engine, Mr. Nitta had the broadest smile on his face as I extolled the virtues of his baby to him later in the day.


See more M109R Photos