The Monster S4 is the “bad boy” of the Monster family.
The equation was simple: make the most powerful, best handling Monster ever. The liquid cooled 916 cc Desmoquattro fuel injected L-Twin is derived directly from our World Superbike champion race bikes. The big bore / short stroke design of the engine delivers tractable power over the widest rpm range, so you’re “on the gas sooner” and shift less. Combining 100+ horsepower and light weight (423 lbs.) results in an inspiring power-to-weight ratio while a close ratio gearbox adds to the excitement.
The S4’s handling is just as impressive as its power. The lightweight Superbike derived trellis frame ensures confidence in the turns. The suspension features fully adjustable front forks and rear shock. The rising rate, ride height adjustable rear suspension includes an aluminum swingarm, lowering “unsprung weight” and improving damping control. A fat 180/55 ZR 17 rear tire and a 120/70 ZR 17 front are mounted on super light Marchesini five spoke wheels. Improved ground clearance allows increased lean angles to take advantage of the S4’s handling prowess.