1. Works good, sounds great!
Hear it in action: https://www.youtube.com/watch?v=OXhOwRckeuE
Installation takes a few hours, probably less if you know what you are doing. You have to lift the tank, remove the airbox and get to the fuel injector connectors underneath. Getting those connectors to let go was tricky for me, they didn't want to come out, and I didn't want to break anything. That part alone took probably an hour. There is no wire splicing or anything needed, its all plug and play. Setup is via a phone app with bluetooth, pretty straightforward and allows some advanced adjustments such as variable shift cut time per RPM range. The shifting action itself on an SV650 isn't particularly refined. If you ride a bike that comes out of the factory with a quickshifter and compare it to this, you will be disappointed. A factory quickshifter bike such as the new ZX-6R will let you move the shift lever up a certain amount with little resistance, get to the shift point, then it shifts, just like that, smooth. No chance of missing the shift. With this, it is firm, the sensor detects the shifter movement, adds a delay to allow you to build up force, and then cuts the fuel. It is only from that cut point forward do you have time to move the shifter, so sometimes you will miss shifts. Of course, this might be something that you will overcome with practice or fine tuning in the app. I don't know. The bike I put this on I am not the primary rider, so I don't get to practice with it much. I should note that you can adjust both the shift pressure threshold and the delay time, so that part can be fine tuned.
The other reason for my not five star review was that I ordered this thing, and a whole month went by without a word, I contacted STG and they responded within a day saying something about parts being backordered(?? Its been a while, not exactly sure) and that it was coming. I ended up waiting about two months for it, so don't order this in a rush thinking you will get it in time for the weekend track day. I can only assume these are individually assembled on a per-demand basis and are not stocked. Either way, it showed up, so i'm happy.
To answer some questions people might have, or at least questions I had:
Can you notice the quickshifter cutting fuel in a normal clutch shift?
-No. I'm not entirely sure if the module still cuts fuel in a normal rolling off throttle and clutching shift. It seems to want to see a certain amount of fuel flow/injector activity before it allows quickshifting. I haven't ridden the bike in a while, but i'm pretty sure I tested this, and it will not quickshift at very light throttle cruising. Either way, I have never noticed it. And anyways, its a fuel cut not ignition cut, so you won't be dumping unburned fuel out of the cylinders.
Does it detect gears, or will it try to quickshift me into 7th?
-No gear detection. You can sit there in 6th just blipping away at the shifter making fart noises.
Is there downshift support?
-Not as far as I know. There is nothing to detect throttle, and the SVs of this generation are all cable throttle anyways.
Does it sound cool?
-Yes. See video above, and this flyby too:
https://www.youtube.com/watch?v=WYyJo0iDiro
