These engines are tuned very mildly and have low redlines. My 1986 Concours had a 10,500 RPM redline, and many sport bikes are far higher than that.

Knowing Honda, they left plenty of cushion when they set the RPM limits. Being a 2 valve engine with mild cam timing that favors the low end, I suspect that without a limiter, power would drop off noticeably before any damage would occur.