Up for sale is RACE TECH 2018 YZ250 Yamaha SHOCK SPRING 5.4KG. The vendor part number is SRSP 622854. Please read the title to know what is for sale HIGH PERFORMANCE SPRINGS: RACE TECH MANUFACTURES PRECISION HIGH PERFORMANCE SPRINGS THAT HAVE A HIGH STIFFNESS TO MASS RATIO. IN OTHER WORDS; OUR SPRINGS ARE LIGHTWEIGHT FOR THE THEIR PARTICULAR RATE. THIS REQUIRES THE FINEST MATERIALS AND PROCESSING.