- The crankshaft is well balanced individually, and straightness is checked so that there is no bending, as well as the vibration is suppressed to its utmost state. Coupled with twelve whole counterweights, remarkable balance, and quietness even at substantial revolutions is realized. In 1995, Nissan revamped the RB25 series https://kameronycdcb.blogspothub.com/27838830/indicators-on-rb26-motor-for-sale-you-should-know