Just got home from a short day and half romp around West Texas. 39-50 degrees and "moist". Gee. My pigbike sure ran strong under these conditions with my gofasternugen. I have no clue what the little dude does ......and don't care enough to learn. Just real happy that my bike is stomping on the terra. Really strong pull in sixth from 80...uhhh.... "up".
Just pulls harder at that rpm than before. No need to downshift.
(2007 GS Adventure with @ 40k with a Full Remus and a magic widget)
If you are on the fence, buy one before ya can't.