The A12 doesnt have the lift that your A9 has so it will be easier on you springs at high speed. The A12 has a longer duration which is where the low end power comes from. I think youll be happy with the A12 and you wont loose much top speed. The cam could quite possibly be all you need. But on the sprocket I am unsure.
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MXR TrailBender 160R
SYC Perf head P&P,Matched intake and exhaust, A12 cam, Orange CDI & coil, Motorio pulley, 115mm Variator and lightweight drive face,11gm Sliders, UNI, modded muffler + 200 horsepower 
http://www.youtube.com/watch?v=3hx-hEWl10c
I'll take your insults as compliments and blame it on your lack of intelligence.
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