KAWASAKI ZR7 ZXR 750 ZZR 1400 250 NINJA AS3 TOP YOKE STEERING STEM NUT RED. Kawasaki ZR7, ZXR 750, ZZR 1400, Z 250 Ninja. 1999-2004 Kawasaki ZR7. 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.
