rebuilt the front end with new mc16 shocks (£15 ebay

im not going to replace the fairing but in gonna make it a streetfighter and make my own fairing for the back.
just wandering if anyone has any ideas for a few things.
does anyone know where i can find a replancement ecu for it.
any ideas how i can improve the carberation, preformance of the engine?
anything else?
im pretty experienced with most things just new to the nsr 250's

al
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Honda nc23 CBR400 AERO 1986, 1990 honda NC23 Tri-Arm, 1987VFR400 NC24 Rothmans Rep, NSR250 MC16 1987, CL250s 1983. Moto guzzi zigolo 110cc 1958. Fantic 50cc 1972. Suzuki Cobra Race bike 500cc 2t 1975 , GP125 1975. Triumph T110 1954. BSA Thunderbird 1955. Ariel VB 600 1952, 1990 MuZ 125 etz.