HONDA CBR 600 RR F1 F2 F3 F4 F5 FS1 FS2 AS3 TOP YOKE STEERING STEM NUT BLUE. AS3 Performance Top Yoke Steering Stem Nut for. AS3 Performance stem nuts are manufactured from 7075 T6 aluminium and are a great upgrade from the OEM stem nuts, they weigh only 21 grams and have an anodized finish to match the rest of our range of CNC machined hard parts.
