These ultra-precision all stainless linkages for were designed by Jetinetics way back in 1990 when Jeff Jacobs was railin' against Chris Fischetti ! These were designed for Mikuni carbs to replace the stock brass shafts that used to crack from engine vibration. These are constructed from billet stainless steel and are precision machined for long life and accuracy. The center coupler provides a flexible union between front and rear carbs for reliable movement. They were so good that Mikuni adopted our design and they've been using it ever since.