| General |
| Year | 2023 | 2025 |
| Make Model | Kawasaki Ninja 400 | Yamaha YZF-R9 |
| Dimensions |
| Seat Height | 785 mm / 30.9 in | 831 mm / 32.5 in |
| Wheelbase | 1370 mm / 53.9 in | 1420 mm / 55.9 in |
| Ground Clearance | 140 mm / 5.5 in | 140 mm / 5.5 in |
| Height | 1120 mm / 44.0 in | 1181 mm / 46.5.in |
| Length | 1990 mm / 78.3 in | 1181 mm / 46.5.in |
| Width | 710 mm / 27.9 in | 706 mm / 27.8 in |
| Weights & Capacities |
| Wet Weight (kg) | 168 | 195 |
| Fuel Capacity | 14 Litres / 3.7 US gal | 14 Litres / 3.7 US gal |
| Wet Weight | 168 kg / 370.3 lbs | 195 kg / 430 lbs |
| Performance |
| Max Power | 33.4 kW / 45 hp @10000 rpm | 117.4 hp / 119PS / 87.5 kW @ 10000 rpm |
| Max Torque | 37 Nm / 27.3 lb-ft @ 8,000 rpm | 93 Nm / 68.6lb-ft @ 7000 rpm |
| Engine |
| Displacement | 399 cc / 24.3 cu-in | 889 cc / 54.2 cu-in |
| Engine Detail | Four stroke, parallel twin, DOHC, 4 valves per cylinder | Four stroke, transverse triple cylinder, DOHC, 4 valves per cylinder |
| Bore x Stroke | 70 x 51.8 mm | 78 x 62.1 mm |
| Compression Ratio | 11.5:1 | 11.5:1 |
| Cooling System | Liquid cooled | Liquid cooled |
| Emissions | EURO5 | - |
| Fuel Induction | DFI with 32mm x 2 throttle bodies | Fuel injection with YCC-T |
| Ignition | TCBI with digital advance | TCI: Transistor Controlled Ignition |
| Lubrication | Forced lubrication, wet sump | Wet sump |
| Starter | Electric | Electric |
| Drivetrain |
| Clutch | Wet multi-disc, manual | Multiplate assist and slipper clutch |
| Final Drive | Chain | O-ring chain |
| Final Drive Ratio | 2.929 (41/14) | - |
| Gear Ratios | 1st 2.929 (41/14) 2nd 2.056 (37/18) 3rd 1.619 (34/21) 4th 1.333 (32/24) 5th 1.154 (30/26) 6th 1.037 (28/27) | - |
| Primary Drive Ratios | 2.219 (71/32) | 1.681 (79/47) |
| Transmission / Drive | 6 Speed | Constant mesh 6-speed transmission |
| Chassis |
| Frame Type | Trellis, high-tensile steel | Aluminium Deltabox |
| Suspension - Front | 41mm Telescopic fork | Telescopic fork, fully adjustable KYB |
| Suspension - Rear | Bottom-Link Uni-Trak, gas-charged shock with adjustable preload | Swingarm (link suspension), fully-adjustable KYB |
| Rake | 24.5° | 22.35° |
| Trail | 92 mm / 3.7 in | 94 mm / 3.7 in |
| Wheel Travel - Front | 120 mm / 4.7 in | 119 mm / 4.7 in |
| Wheel Travel - Rear | 130 mm / 5.1 in | 117 mm / 4.6 in |
| Wheels & Brakes |
| Brakes - Front | Single 310mm semi-floating petal disc. Caliper: Single balanced actuation dual piston | 2x 320mm hydraulic discs, 4-piston calipers, Brembo Stylema radial master cylinder |
| Brakes - Rear | Single 220 mm petal disc. Caliper: Dual-piston | Single 220mm hydraulic disc, single piston caliper |
| ABS | Standard | Standard |
| Tyres - Front | 110/70R17 M/C 54 H | 120/70 ZR17 M/C (58W) |
| Tyres - Rear | 150/60R17 M/C 66 H | 180/55 ZR17 M/C (73W) |
| Wheels - Front | - | MT3.5 x 17 M/C |
| Wheels - Rear | - | MT5.50 x 17 M/C |