Rev Moto quick shifter

[TX_Grubby]

I'm trying to see if anyone has used this and can share their experience with it. Debating getting one for my XB9SX.

https://www.rev-mo.com/product-page/quickshift-sensor-for-2003-2010-xb-models

 

[Barrett]

If your goal is to substantially decrease the life of your XB transmission then by all means.....install one.

 

[Cooter]

Barrett, you are a wealth of information but I gotta disagree with that statement wholeheartedly. IMHO, a quickshifter one of the best additions you can do to any bike that you want to ride quickly without causing any stress or damage to the transmission.

Buell felt a quick shifter function was so important, they built it into the OE Buell ECM, which the Rev-Mo system utilizes, and almost every modern sport motorcycle still has the same transmission but come with a quick shifter function.

The caveat is that the Buell factory system is now 20 years old, and rudimentary for today's standards (for OEM). It uses a simple time delay, (like every aftermarket system still does today) and functions very well for its purpose of shifting at high RPM and full throttle, not the seamless any-shift-at-any-time like a new motorcycle does.

If your goal is to substantially decrease the life of your XB transmission then by all means.....install one.

 

[oh9bolt]

I've always wanted this but was worried about what John said.

I want to hear about long term usage on a XB

 

[Cooter]

The XB can be compared to most modern motorcycles in that regard because has a very same/typical constant mesh transmission that is in a vast majority of motorcycles for many decades now.
Here's a good example:
Right about the 3min mark shows engaging 1st gear, note that the gears stay meshed the whole time, but rather the notches (dogs on the face of the gears) that the power travels through first.

Pulling the clutch or releasing the throttle with pressure on the shifter, or killing the ignition for 90mS (stock Buell ECM setting) all do the same thing. They allow the dogs to line up at the approximately the same speed to engage the next gear. That's why a QS is such an easy and risk free upgrade. Because it's not doing anything differently than the transmission was designed for.

I understand the fear of grinding gears is pretty ingrained in peoples psyche, haha, but once you understand how a motorcycle transmission is different than a typical manual car (was) it becomes pretty obvious there's nothing to worry about.

Or ask the easy question. If a QS did cause wear, stress, or anything bad, would any mfg risk a warranty or reputation nightmare? Would they be so dang common today?

For Buells specifically, there are several ways to activate it (magnets, potentiometers, switches, whatever) but all they do is activate the OEM ECM to kill the ignition or fuel (or both, your choice) for 90mS*. That allows the engine to slow to the approximate RPM to match the speed of the next set of dogs (gear faces) and just click safely into gear. NO different from a proper clutch upshift at all.

* Although that 90mS is adjustable with TunerPro or ECMSpy, it is the same in every gear, so that's why the Buell QS is best when used they way all QS' were originally intended. Full throttle high RPM upshifts. New bikes have the benefit of throttle by wire and powerful ECMs that allow for complicated algorithms that allow any up or down shift at any RPM of throttle opening seamlessly. Buells are still Buells, lol.

TL;DR The best upgrade ever

 

[34nineteen]

Buell felt a quick shifter function was so important, they built it into the OE Buell ECM, which the Rev-Mo system utilizes, and almost every modern sport motorcycle still has the same transmission but come with a quick shifter function.

Lets make a correction here:

Buell felt a quick shifter function was so important, they built it into the OE Buell DDFI-3 (08-up XB and 1125) ECM, which the Rev-Mo system utilizes, and almost every modern sport motorcycle still has the same transmission but come with a quick shifter function.

That said, if you are running a DDFI3 bike, sure.... why not? I'm running a Rev-Mo quickshifter on my XB race/track bike.

The methbuell is not, but thats mainly because its a DDFI2 bike which requires a separate controller for it. I think Dave has a solution for that too.

 

[Kurlon]

I will say, despite the reputation of HD transmissions being agricultural, and the Buell's requiring more lever effort than anything that's been in my fleet, when hustled the XB clutchless shifted beautifully up and down, without a QS. I never had anything resembling a questionable shift. A real QS would be cheating.

 

[Cooter]

True, . Plenty of threads on how to actually make the simple mod work. I'm just bringing up the evidence to prove my point and trying to keep a complicated answer as simple as possible

And very true, Kurlon. The XB never wanted or needed any fancy ramp, diaphragm, slipper, or additional undercut, to be rock solid/ easy click-in clutches shifts. It might even be the factory slop that allows them to be so good? LOL. There's PLENTY of engine braking at high RPM....

 

[Barrett]

Quick Shift gizmos are for real men on real motorcycles. Probably why that p@ssy Barrett doesn't use one.
Warm Regards, FabioDriven

 

[34nineteen]

sez: I'm just trying to let the OP know that it likely wont be as plug and play as it is for the DDFI-3 bikes. Not impossible, but not quite plug and play for DDFI2.

I'm still p*ssed at you for getting me hooked on these damn things and making me spend money.