GP Shift and Rearsets

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KneeDownV2

KneeDownV2

Joined
Feb 3, 2023
Messages
34
Location
New Zealand
I got me some Bonamici rearsets that is GP Shift capable, read some mixed reviews if GP shift will work with the standard quickshifter setup. I always used GP shift on all previous bikes.

Anyone converted to GP shift using the stock quickshifter?
 
Eh…in every instance I’m aware of, you merely change the linkage to reverse it. There is no electronic change to the shifter…
 
It depends on the particular rearset, if you have to flip the shift knuckle on the gearshift spline, then you have to reverse the polarity of the quick shifter, but if you can swap the shift rod at the pedal end to the other side of the fulcrum then you don't need to.
 
The advice to "flip the wires" is just plain bananas wrong...I'm not aware of any rearset brand/model which doesn't have the same functionality as the OEM rearsets, that is you can set it up either way with the OEM QS, save for some race specific ones which are GP only.
 
I'm talking about the quickshifter mechanism wiring, in order for it to work with GP shift you have to flip/reverse the wires on the quickshifter lol. You have to fit the shifter arm off the motor upside down for the linkage to fit through the frame to your GP shift rearsets, thus you have to flip/reverse polarity on the wires on the quickshifter. That's what I had to do on mine because if I remember right it threw an error and didn't work untill I flipped it.
 
Last edited:
There's no flipping of polarity.

There's a ground wire, +5V supply and signal to ECU. At rest the signal wire sends about +2.5V to the ECU. For a downshift, it's about +1.8V and for an upshift its about +3.8V. The ECU has to see one of those voltages to trigger a blip or a cut. The shifter rod acts on the sensor in a particular direction to cause the signal to change.

By changing the point the shifter linkage mounts to, you change the direction of the foot pedal while the action on the sensor remains the same. IE, extends for an upshift, causing the +3.8V signal, and compresses for a downshift, which sends a +1.8V along the signal wire.

This is the parts diagram for the Panigale V2 Bonamici rearsets the OP mentioned. Changing to GP shift merely involves changing which point on the gear selector, which is part 8 on the gear side on the lower portion of the drawing. There is no modification to the wiring.

1710174175689.png
 
Nope its both, with my aftermarket rearsets you had to flip the shift lever 90 degrees to get the linkage through the frame portion, if I get a change ill take a picture when I get home
 
Wires would need to be "flipped" if the change in linkage is done on the engine side. That changes the push/pull relationship to up/down shifting.

If the linkage change is done at rearset side then no wiring change to achieve gp shift patern
 
I have Ducati Performance Rizoma Rearsets and when going to GP shift (what i have it set up as now), no flipping of wires or anything is needed. As airjawed said, if the change is done at the rear sets side, don’t need to mess with the wiring.
 
I could have sworn with the 1199, which was up only on the QS, there was a GP shift kit which had an extension for the QS wiring which basically did just that. I've just never heard of that with 3-wire up/down quickshifters. Stranger things have happened.
 
This is exactly what I had to do, I'm pretty sure if you buy the actual gp shift kit for the stock rearsets from Ducati of Omaha it comes with a harness already flipped, and also requires you to flip the linkage 90 degrees

www.ducatiomaha.com

96580241AA - REVERSE (GP SHIFT) GEAR CHANGE CONTROL WIRING V2

Ducati Panigale V2 Reverse (GP) Shift Kit - Includes new shift sensor wiring and new shift rod spline to make it the "1-up, 5-down" shift pattern preferred by many track riders and racers. Download installation instructions here: INSTALLATION 96580241AA
www.ducatiomaha.com www.ducatiomaha.com
 
bp_SFV4 said:
I could have sworn with the 1199, which was up only on the QS, there was a GP shift kit which had an extension for the QS wiring which basically did just that. I've just never heard of that with 3-wire up/down quickshifters. Stranger things have happened.
Click to expand...

Its pretty simple, the QS has different timings for up vs down so if the shift knuckle on the spline is rotated 180 degrees then the QS response is effectively swapped since the "push"action is now an upshift in GP mode rather than a "pull" action. Changing the shift rod on the pedal end to the opposite side of the pivot keeps the QS action the same as the "pull" is now going up through the gears. Clear as mud? Thats why most aftermarket GP shifts dont need to swap the QS wiring over.
 
What the ECU does for a quickshift/up is not the same as autoblip/down. Quickshift is a momentary shutting of throttle. Autoblip is a momentary increase of throttle.

Those of you who can do clutchless shifting in bikes without electronics will know exactly what the difference is.
 
for anyone that actually did the gp shift for this rear set, did you have clearance issues with the swing arm? The bolt that connects the linkage rod to the rear set isn’t clearing the swing arm for me. I’m about to start getting creative…
 
I changed the allen bolt to a normal bolt and also added some red strong loctite. I didnt do GP shift though as I will eventually get to it. Noticed the fairing touches the left rearset so had to add some doublesided tape between rearset and fairing
 

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