Lonestar Racing Steering Stem with 1 1/8 Anti-Vibe Handlebar Clamp. Fits: Kawasaki KFX450R (All Years). All Steering Stems are made from 4130 Chromoly Steel that offers superior strength over the OEM mild steel unit. They also feature the Anti-Vibration clamp kit that helps reduce rider fatigue. ATV Galaxy is an authorized Lonestar Racing dealer located in Irvine California.