For every 20 km/h (12 mph) that I accelerate (or slow down) in 6th gear, the rpm increases by about 1,000. So at 140 km/h (87 mph) the engine will spin at around 7,000 rmp; 160 km/h at 8,000 and so on. On the highway going 75-85 my tach hovers between 6-7k in 6th and I haven't had any issues with 3 hour trips. Boomerlcd. 342 posts · Joined 2022. #5 · Sep 4, 2022. I take my 400 on an epic 160 mile round trip to work almost daily. Speeds from 15mph to 85+. She is a lil beast and can take a thrashing. Projects - 1980, 81, 82 CB750F. Runners - 1983 CB1100F, 2014 CB1000R, 2021 N400. Bluemule, BamaDad72, Cris and 7 others. Kawasaki Ninja ZX-4RR specs Notes; Engine type: Inline four-cylinder, liquid-cooled, dual overhead cams, 4 valves per cylinder: No other current motorcycle with this small a 400-cc engine: Capacity: 399 cc: Bore x stroke (mm) 57.0 x 39.1: Compression ratio: 12.3:1 per manual 12.4:1 per press release: Transmission: 6-speed, chain drive: Front The 2024 Kawasaki Ninja ZX-25R Produces 47 Horsepower. Kawasaki. The biggest update for 2024 has come to the ZX-25R’s powerhouse. Though the bore and stroke remain the same, the inline-four .

ninja 400 rpm limit