What's preventing your engine from pulling taller gearing is your aero.
But at a C70 speed, is it already that paramount ?
I don't know about NY but I can't think of a well integrated fairing being broken just for fun in a civilized country ...
Obviously not the same for cardboard and duct tape attempt ...
I'm all for engine tuning but to be honest there is not much efficiency hidden in a motorbike engine ...
Front fairing is your best bet money wise.
You need to offer least resistance to air and position is important.
Think racing moppeds.
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