Can you run an aftermarket exhaust without an ECU on the 696/769?
Regardless of the exhaust... I think you'll find the bike wont run at all without an ECU
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. But seriously.... plenty of folk are running slip-on cans with a stock ECU without any adverse effect.
Or maybe do something to the ecu to make it compatible with the aftermarket slip ons (Termignoni, Arrow, MIVV, etc.)
Search "Rexxer".