How the hell did you get 60lbs off your bike?!
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Pilot- A local shop told my buddies {one with a 06 1k and the other with a 07 busa} that on his dyno they both the 1k and gen 1 busas put down identical numbers in stock form.
As far as who would win between you and them...... it really will come down to rider,weight and to be honest how both bikes actually run. You can go online and see gen 1's trapping low 130's all the way up to mid 140's. Every bike is different!! All you can do is run them and find out!!
I will tell you this!! We weighed our bikes at the track. The 1k guy is 160lbs and with 1/2 a tank of gas came in at 585lbs. Im 225lbs and with 1/2 tank of gas in my 03 busa I was 750lbs. My other buddy is 260lbs and came in at 785lbs on his 07 busa.
The 1k stretched {62'},drag radial,non- o-ring chain,slip-on,16/44 and strapped has run a best of 9.72@143 {145whp}
The 07 busa stretched {64'} drag radial,baffled dumps,airbox mod,lowered,strapped,16/42 and mapped pc5....9.96@138 {156whp}
My 03 busa {56'} hmf big bird,pc3r not tuned,16/42,air box mod,lowered and strapped.....9.99@142 {163whp}