I believe your Katana was extremely unhealthy. Apparently, the 1100 version of the Katana (which you tested) was able to run the quarter mile at 11.05sec @ 123.64mph (Cycle World february -83). That would've been enough to at least keep up with the GT40. Even the 1000cc version was able to do the 1/4 mile at 11.32 sec @ 120 mph quarter mile.
Are you sure you didn't test the 400cc version ?
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