Suspension problem or air pressure problem?

I have a 01 busa and was wondering if anyone had suggestions. I put air up to 42 psi like manual says. Bike rode very bouncy. I feel everything on road. Mind you bike is lowered and stretched. My airbagged s10 was never this bouncy and that sat on frame. So I adjusted tire air pressure on bike and then bike felt squirely on hard take off from light. So then I put air pressure up a hair, now its bouncy again. Wtf

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