You are suppose to drag gear starting from gear 2. You can reach top speed much faster. Looks like your spec 1 riding with stock pipe. Vtec kick in. Not loud at all
You know that is super four, with a linear power curve and no torque at all. All the power are in the High end (as for your bike its 12,000 RPM) why not shift at 12k on every gear? this video just point out that my 1992 Super Four is way faster because it can do a top speed of 200km/s in slit seconds... Bad Driver demonstrating top speed