The S models in the Suzuki Boulevard series were largely the rebadged Intruder models which can trace their roots back to the introduction of the original Intruder 700 in 1986. The Suzuki Savage was renamed the S40. The S40 Suzuki Boulevard is powered by a 40 cu. in. (652cc) air-cooled single-cylinder engine producing 30 horsepower. The Savage was introduced in 1986 and presently continues in the Suzuki line-up as the S40. The Intruder 800 was replaced by the S50, while the Intruder 1400 was replaced by the S83. The S50 is the cousin to the original Intruder 700, now with a new name and a 50 cu. in. (819cc) V-Twin engine. The S83 (Intruder 1400) is powered by a liquid-cooled, 1360cc V-Twin engine producing 72 horsepower.

The C50 Suzuki Boulevard was formerly the Volusia 800. New on the C50 Boulevard for 2005 was the introduction of fuel injection replacing the Volusia’s carburetors. The C50 Boulevard can trace its roots to the bike’s introduction in 2001 in Volusia County, Florida. The other C model was the C90, which the year before was the Intruder 1500. Launched in 1998 with classic styling and wide handlebar, the 1500 Intruder was unlike other Intruder models.

The M50 Suzuki Boulevard, like the C50 Boulevard, was also based on the Volusia 800. The M50 differed from the C50 with 41mm forks, the engine was painted black, and inside the 805cc V-Twin the M50 received split crank bearings (the C50 used single-piece bearings). The M50 also had different fenders and fuel tank, and the speedometer was mounted on the handlebar instead of on the fuel tank.

Introduced as a new model to the Suzuki Boulevard line in 2006 was the M109R. In the spirit of the Yamaha V-Max, the M109R was a power cruiser featuring a liquid-cooled, DOHC, fuel-injected,1783cc, 8-valve V-Twin engine producing 127 horsepower at 6,200 rpm and 117 lb.-ft. of torque at 3,200 rpm. For 2011 Suzuki offered a limited edition M109R Suzuki Boulevard with custom paint and custom gauges.

In 2009 Suzuki introduced the C109R Boulevard. Using the same engine found the M109R, the C109R delivers heady performance in a cruiser with classic styling. The C109RT Boulevard takes the classic look one step further with standard windshield, leather saddlebags and a passenger backrest.