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That thingy is supplied by Deni ie. ex-parther of keihin http://www.dekni.com/about.asp#dashi

Isn't it hide under the seat? After u can find it, took photos: tiny letters / brand on the label | type of connector ...
Once u know the bike had which solution, chance of getting something to...

ECU's brand & model?
Add extra cc : We can guess how much from previous experience in other bike that had similar ECU w/o re-write the maps (Re-write maps = PiTA) ...
btw. domestic K166FML is...