Maybe replace the rear sprocket with a smaller one? I know that's not stock but a minor change.65mph doesn't really sound achievable in stock form. May be closer to 60?
I'll be puttin a flag on mine.... Like you see on dirt toys and such... Ok maybe not as long... But yes a flag..the other guy who reviewed it says you barely see the bike in your vision. doesnt sound like fun riding in heavy USA traffic!