Renthal – Renthal Rear Sprockets - Twinring - Kawasaki, including 94-23 KX125-400/F/X and KLX250R-450R Twinrings, 92-98 KX125 and KX 250 two-stroke and KLX650/R fitments, 20-22 KLX300R sprockets and 04-23 KX 125 X/XC and KX450XC options in green, black and silver. Long-life gearing makes obvious sense on Kawasaki's off-road models, where a KLX or KX-X gets ridden for hours between services rather than for two twenty-minute motos. The Twinring design pairs a heat-treated steel tooth ring with a lightweight alloy carrier, giving the durability of a steel sprocket without the rotating mass that dulls acceleration and unsettles the rear suspension. Available in 49P, 50P and 51P, these ratios lean toward drive and traction, exactly what tight woods, rocky hillclimbs and deep sand call for. The steel ring holds an accurate tooth form long after an all-aluminium sprocket would start hooking, which protects the chain and keeps engagement quiet. Green anodized carriers keep a Kawasaki looking factory while the drivetrain feels tight and consistent ride after ride. Trail and off-road riders in particular appreciate gearing that survives a whole riding season of mud, water and grit.