...back on topic...
If you install the Turbosmart BOV and route the throttle body vacuum line directly to it you are left with a "Purge Valve" doing nothing useful.
Unplug it and the bike goes into one of it's "limp-modes" with a lazy, spongy throttle and will only rev to about mid-range.
The fix for this was simple enough.
Remove the valve, cut the plug off (with enough wire to solder it back later if you change your mind) and solder in it's place a 22ohm 10watt resistor. It will cost you $2 odd and take 10 minutes. Picture of the resistor below.
I used the 22ohm 10watt but you can also use 2 x 47ohm 5watt resistors in parallel. I tested both but the longer single resistor was easier to solder and heatshrink on the end of the loom than the square block of 2 x 5watt ones.
You can always just leave the original valve in there but for me, this is a more permanent fix for something that the flash tools don't disable.
FYI - This is potentially the same "fix" for the air switching valve if you want to get rid of the dash error without flashing the ECU... but I've not tested that yet as I've turned it off in the ECU.
I have the Don Guhl flash and just picked up the BOV. I was just going to install the BOV in and plumb to the Throttle body. So is that not the best way? I was trying to make the on off throttle transition smoother. Can you explain the resistors more and if this will help with the transition. I'm not quite understanding the best or right way of doing this.....thank you!!!