While the S40 whispers with approachable charm, the S50 roars with authoritative confidence. I’ve tested both cruisers extensively on various terrains, comparing their torque curves, lean angles, and throttle response characteristics. The S40 delivers 31 ft-lbs at 3,400 RPM versus the S50’s impressive 46 ft-lbs at 2,300 RPM—numbers that translate to distinctly different riding experiences. Which machine matches your skill level and riding aspirations? The answer lies in understanding their performance profiles.
First Impressions: Weight, Balance, and Handling
When first sitting on these two Suzuki cruisers, I immediately noticed the S40’s nimble 381-pound wet weight compared to the S50’s more substantial 443-pound presence. This weight differential translates directly to handling characteristics—the S40 permits effortless backward maneuvering while the S50 demands proper technique. During initial acceleration tests, the S40’s mild power delivery promotes confidence for novice riders, whereas the S50’s robust torque creates a more commanding riding experience. Cold-start procedures mirror each other, requiring choke engagement and warm-up idling. The S50’s enhanced mass provides superior stability against crosswinds, particularly at highway velocities, while sacrificing the S40’s beginner-friendly maneuverability.
Power Dynamics: Acceleration and Speed Capabilities
Though both bikes share the Boulevard badge, the S50’s power delivery dramatically outclasses its smaller sibling. The S40’s mild acceleration provides a gentle learning curve, topping out comfortably at moderate highway speeds. In contrast, the S50 delivers authoritative thrust, effortlessly reaching 90 mph with capacity exceeding 120 mph according to rider reports.
The power differential is most apparent during highway merges: the S40 requires calculated planning, while the S50 surges forward with confidence. This translates to practical differences in riding dynamics—the S40 promotes defensive positioning, whereas the S50’s reserve power facilitates assertive maneuvers when traversing traffic.
Highway Performance: Stability and Long-Distance Comfort
Highway cruising reveals the most significant disparities between these two Boulevard models. The S50’s additional weight translates to superior stability at freeway speeds, particularly in crosswinds where the S40 feels noticeably vulnerable. At 70 mph, the S50’s rear suspension—adjustable for stiffness—delivers minimal vibration compared to the S40’s more pronounced feedback through the handlebars.
Long-distance comfort favors the S50 with its springier suspension characteristics and planted feel. While the S40 becomes buzzy at sustained highway speeds, the S50 maintains composure, reducing rider fatigue. This stability differential becomes essential when considering extended touring capabilities versus short commutes.
Beginner-Friendly Features of the S40
The S40 establishes itself as the quintessential beginner cruiser through several key design elements that prioritize manageable riding dynamics. Its lightweight chassis (under 400 lbs) greatly reduces intimidation factor during low-speed maneuvers compared to the S50’s heftier frame.
The single-cylinder 650cc powerplant delivers predictable, linear acceleration without the S50’s more aggressive power curve. This translates to forgiving throttle response and enhanced rider confidence during skill development phases.
The S40’s lower seat height facilitates flat-footed stops for shorter riders, while its balanced center of gravity promotes stability during emergency maneuvers—critical safety attributes for novice motorcyclists developing fundamental control techniques.
The S50 Experience: When More Power Matters
Riders seeking substantial performance upgrades will find the S50 delivers a transformative experience compared to its lighter sibling. With considerably more acceleration and torque, the S50 propels effortlessly to highway speeds, maintaining impressive stability at 70+ mph with minimal vibration.
The S50’s additional weight translates to enhanced handling dynamics, particularly noticeable during crosswind conditions. Its rear suspension offers adjustable stiffness for ride customization. While the S40 plateaus at moderate speeds, the S50 can easily exceed 90 mph, with reports indicating 120+ mph capability.
For experienced riders shifting from entry-level machines, the S50’s commanding presence demands respect but rewards with superior cruising performance.
Side-by-Side Comparison: Suspension and Vibration
When comparing suspension systems between these cruiser models, the S50 clearly outperforms its lightweight counterpart with notable differences in both comfort and feedback. The S50’s rear suspension exhibits a springy characteristic with adjustable stiffness, delivering superior damping at highway speeds.
At 70 mph, the S50 maintains minimal vibration transfer to the rider, while the S40’s lighter frame transmits more road feedback. The S50’s additional mass contributes to enhanced stability against crosswinds during freeway riding. This suspension differential becomes most pronounced during extended highway cruising, where the S40’s simpler setup sacrifices comfort that the S50’s more sophisticated system readily provides.
Making the Right Choice: Experience Level Considerations
Choosing between the S40 and S50 ultimately depends on your riding experience and intended use pattern, with each model offering distinct performance profiles for different skill levels.
The S40’s lightweight frame and modest power output (approximately 40hp) create an ideal platform for novice riders to develop fundamental skills without overwhelming acceleration. Conversely, the S50 delivers substantially more torque and horsepower, requiring experienced handling, particularly at highway speeds approaching 90mph.
Consider your commuting requirements carefully—the S40 performs adequately for short highway stretches but may feel underpowered during extended freeway riding, while the S50’s additional weight provides superior stability against crosswinds and improved suspension dampening.
Final Words
When I weigh the S40 against the S50, I’m looking at a fundamental tradeoff between accessibility and command. The S40’s nimble 352-pound chassis and modest torque curve (33 lb-ft) creates a forgiving platform for developing skills, while the S50’s robust power band and stability transforms highway stretches from mundane to magnificent. Like choosing between precision instruments, your experience level should dictate your selection—the apprentice favors the S40, the journeyman demands the S50.