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I have never had this problem. I took a screenshot of your picture. The red circle those 2 bolt controls the bar that the swivel clamps on to. They need to be extremely tight. The blue circle is the clamp on the swivel that mounts to the bar that is turning. The clamp has a locking nut on one side. Its 1/2 inch. Make sure that is extremely tight as well. I was running wide open today and my it zup board and rack did not move. 47 mph
The stock racks have two different widths for the forks. I know in the Yamaha parts site it shows different racks with equal width forks. It also mentions the image may not represent the actual product, or something to that effect.
Can anyone post the brand and any information on where to buy these? I have the deluxe swivel black and they are equal width that fits wakeboards and some surfboards.
