Why in Christ's name would he remove one of the brakes? As hot as mine can get if I'm pushing hard on Blood I'd be almost worried, just riding a normal quick pace I never touch them though, so you should be fine.
Less rotating mass = quicker acceleration. Only done for drag racing. Stupid for street UNLESS you ride really careful.
Also, who the fuck stretches a classic GSXR? Looks atrocious and I can only image all the people pointing and laughing at it.