The only way to get decent performance from the '16 is to replace the carbs and barrels with '18 items I'm afraid. The carbs and ports in the barrels are too small on the '16 to make much more power.

ecu? do you mean the cdi units( there are 2 on a '16) under the electrics junction, just behind the headstock.?

Honda has them new, about£100 I think, or e-bay is your best bet.
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