I am on my 5th WR... the stutter has been there on everyone of them. The TPS stutter IS well documented and proven to be a result of the CDI doing what it is supposed to do (or so I am told). If you have a stutter, (noticeable), while riding single track then you have a problem that may or may not be the TPS or jetting BUT If you notice this stutter at mid throttle - cruising speed... IT IS THE TPS! Mine is unplugged and Wa-la... the stutter is gone while DS'ing. I for one am very anxious to see this switch (c'mon William:worthy:) because I have a noticeable lag in low end response while off road riding and the TPS is un-plugged. With the IMS tank, it is not a quick and easy thing to plug and un-plug. Unplug the TPS, go for a ride, ignore the performance loss, just look for the stutter. If the steady state is better, then this switch concept will work. I'll make a concerted effort next week to come up with a game plan and parts list. A straight on/off switch is simple. A little more complex (but not much) will be to fool the CDI into thinking you are at a certain throttle position that does not make the the stutter appear. I guess I'll have to go for a road ride with a pot on the CDI, ride at mid throttle and try a few different pot settings. Which ever one gives me reasonable power and no stutter, I'll figure out what the resistance is and make a toggle setup and test that. I promise, I'll get off my fat ass.