ODIE,
I have read that the bike makes peak power at 12500 rpm. On my last ride I was running about 140 mph or around 12000+ rpm and I wanted to see what my black 636 had so I held it and it pulls way harder than my zx7 and it did not stop pulling. I let off at 158 and there was no sign of my bike wanting to stop, I believe red-zx that it will go 167.(on the speedo)
luv2surf
2003 636