Sky's The Limit: A 250cc Motorcycle Just Breached 155mph!
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I want a 4 cylinder 250cc motorcycle soooo bad... : r/motorcycles
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Why is there no more inline-4 for the 250/300cc motorcycles? - Quora
The Kawasaki ZX-25R is real: 250 cc, four-cylinder glory - RevZilla
Yamaha Working on a 250cc Four-Cylinder Kawasaki Ninja ZX-25R Rival?
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A New 4 In-Line 250cc Kawasaki Ninja Rumored - autoevolution
The Kawasaki Ninja ZX-25R: 250cc, 4 Cylinders, 17,000 RPM
Is Kawasaki really developing a new 250cc four-cylinder sports bike?
New 2020 Kawasaki ZX-25R 250cc Inline-4 Motorcycle Announced - YouTube
New Yamaha 250cc, 4-cylinder Bike Under Development?
250cc 4-cylinder Yamaha R25M (Kawasaki Ninja ZX-25R rival) in the works?
