120/60 is lower profile than 120/70, the second number (height) is a percentage of the first (width). DD racers regularly use (or at least did) 70 profile tyres, both because they’re more commonly stocked and you’re less likely to run off the edge of the tread at extreme lean angles.
Oz also has superbike forks on his 696, so a very different beast, although I don’t know what order he did the mods in, he may know anyhow.
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