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I modified my R18b to be a tourer. The TC helps a bit with the tourpack, lower fairings and wind protection... but all can be done with the B...
What really made it a tourer was a Russle Day Long seat, Heli Bars and 7Jurock screen... before that, anything over a tank of gas hurt the body...
Try pulling the 50 amp fuse. let it sit for 90 seconds. I also try to turn the power on during this 90 seconds to draw any remaining energy. reinstall the fuse. then start her up. take her for a spin and see if you still get that SOS error.
Add four power sources... I used 2 for driving lights... they're also dimmable and they turn off on the side you use your turn signals for..
The third I had wired for a Billy brake light
Depends on your location emission testing... If your states side, I highly doubt it will fail... our bikes (well technically yours since I just sold mine) have wide band oxygen sensors that will tell the ecu to adjust for the exhaust flow