For 2001, Suzuki introduced a new GSX-R model that replaced the largest and most powerful model of the GSX-R series sport bike, the GSX-R1100, with the all new GSX-R1000. As the model name revealed, the engine's cylinder displacement was roughly 1,000 cc, about 100 cc smaller than its predecessor. The GSX-R1000 was not just an enlarged version of the GSX-R750, although it shared many features with its little brother. The main frame is the same in both models, but the material used on the big brother was 0.5 mm thicker. Suzuki claimed the torsional rigidity of the frame had increased 10% in comparison with the GSX-R750. The GSX-R1000 engine was a redesigned GSX-R750 engine. The R1000 had a 1 mm bigger bore and 13 mm longer stroke, newly designed pistons with lower crown, and gear-driven counter balancer. The engine weighed 59 kg which was slightly heavier than the 750 engine but 14 kg lighter than the engine of the GSX1300R. The performance of the engine is a peak of 160 bhp (120 kW) at 9,500 rpm, as measured on the crank and 143 hp (107 kW), when measured on the rear wheel with small variations between different instances of the same model. The redline is set at 12,000 rpm. The maximum torque of the engine is 110 N·m at 8,000 rpm. Combined with a total (dry) weight of 170 kg this gives the GSX-R1000 a top speed of 278 km/h.PP Tuning performance parts for Suzuki GSX-R 1000 (2001–2002), rearsets, adjustable brake and clutch levers, clip-on handlebars, protectors etc. are produced from highly resistant materials. This ensures their longevity.