Hi Folks. Changing exhaust on EFI bikes requires remapping of the ECU to adjust the fuel map. This is known as a 'tune'.
My 2010 Speedmaster came with a 20183 tune. This is the stock tune for a Speedmaster/America with with mechanical speedometer. The LCD/Electronic speedometer models have different tunes.
For modded or aftermarket pipes my 2010 requires the 20184 tune. This will richen the mixture a bit to compensate for the loss in backpressure and reduce popping.
I used TuneECU to do this work
here To read the existing fuel map
here First, you must read the map which can take about 20 minutes. The engine is off, but the ignition is on. There is NO separate fuse for the headlight on the Speedmaster, so
it is imperative to have a fully charged battery and it have it plugged into a charger or disconnect the headlight bulb. Once the map has been read in, you can save it to your computer.
The next step is DOWNLOAD a tune into the ECU. This goes much quicker than the read. It takes just a few seconds to to this.
Once this is done, the throttle position sensor (TPS) needs to be reset. This is done with TuneECU running. The bike is started and idled for a few minutes to do this.
ECU Reset TPS is selected in TuneECU, and then the engine is started. Let the engine idle until the “TPS” status indicator (in the status bar) changes to green (after 10 to 15 minutes).
No throttle input must be used during this process! Tunes are available
here To do this job you need a notebook or netbook computer running Windows XP or better. I use a small netbook.
For data cable and system requirment specs
here TuneECU has been developed privately, and is available at no charge by the developer. I believe that you can donate to the cause if you wish on his website.
I hope this note points those with EFI bikes in the right direction.
Hyates
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