What causes the rattling noise in the Ninja400?

[GabrielleDella]

The rattling noise in the Ninja400 may be caused by the meshing of the balancer shaft gears. Here is some relevant information about the Ninja: 1. New Instrument Panel: Features a newly designed asymmetrical instrument panel. The tachometer adopts an intuitive analog style, while speed, mileage, trip distance, etc., are displayed digitally on the LCD screen. Additionally, it includes a fuel gauge, clock, and an economy driving indicator for more fuel-efficient riding. 2. Short Muffler: Equipped with a newly designed short muffler with a unique cross-section. Combined with a small tail spoiler and 140mm-wide tires, it delivers a powerful and dynamic presence that exceeds its class. 3. 140mm-Wide Tires and 10-Spoke Wheels: To match the enhanced engine performance, the rear tire has been widened from the previous 130mm to 140mm, improving straight-line stability. To complement the wider wheel, the Ninja-ZX-14R features a new 10-spoke wheel design that enhances the sense of quality.