this is since no one seems to read the http://www.ds450hq.com/forums/general-discussion/2229-ds450-faq.html so here we go
ECU has two maps.
Uncut wire = stock settings
Cut wire = more fuel
If the wire is NOT CUT, then you will add more fuel with the fmi controller to bring the bike up to tuned.
If the wire IS CUT, then you will add less fuel with the controller.
The fmi controller is just a tool to add or take away fuel!
To tune it properly, you should do a dyno session and according to the o2 reading, you will add or take away fuel with the controller.
the fmi units are piggybacks, they do not interfere with the ecu. if the pink wire is cut, then the ecu is sending out a different map. the fmi tuners are piggybacks off of the STOCK ecu map, if you change the stock settings, the piggyback might not work like the fmi manufacturers suggest
ECU has two maps.
Uncut wire = stock settings
Cut wire = more fuel
If the wire is NOT CUT, then you will add more fuel with the fmi controller to bring the bike up to tuned.
If the wire IS CUT, then you will add less fuel with the controller.
The fmi controller is just a tool to add or take away fuel!
To tune it properly, you should do a dyno session and according to the o2 reading, you will add or take away fuel with the controller.
the fmi units are piggybacks, they do not interfere with the ecu. if the pink wire is cut, then the ecu is sending out a different map. the fmi tuners are piggybacks off of the STOCK ecu map, if you change the stock settings, the piggyback might not work like the fmi manufacturers suggest