kiss fc v2 review

KISS FC v2 Flight Controller | Kick A$$ or KISS my A$$

KISS FC v2 Flight Controller

It’s been over a year since I used any KISS gear. BetaFlight has been so good to me lately I didn’t wanna leave.  And now RaceFlight is even better.  In the original KISS, we had some annoying oscillation issues.  We built 10 identical quads with the original KISS fc and all 10 had a weird oscillation we couldn’t get rid of.  Finally we had to flash the KISS fc with Betaflight and it fixed the issue.  There were a lot of issues with KISS in the past so I gave up on them.  I’ve heard a lot of good things about the new KISS FC v2 that I had to give them another shot.

Parts Used in this Build
  • STM32F722RET6 MCU, ARM-Cortex M7 with FPU running at 216Mhz
  • MPU6000 Gyro and ACC Sensor
  • first 4 esc signals are 5v boosted
  • 2-6s input
  • 5v 500mah outputs
  • 5g
  • 30x30mm mount holes.  have not clue why they still wont conform to the standard 30.5mm

Physically the board looks similar to the original KISS board.  The biggest physical change is that now all the solder pads are on one side of the board.  Thank you KISS for doing that!

KISS fc v2 Build

Hallelujah, they finally moved all the solder pads on the top side of the board.  On the original board you had to solder on both sides of the board which was a pain.  On the KISSv2 the signal pads are at the 4 corners.  Paired with the Aikon AK32 35A 4in1 ESC the physical install was a piece of cake.  The AK32 has a VBAT wire in the harness so all you do is solder that directly to the power pad on the KISS cause it can take voltages up to 6s.

kiss fc v2 review

I’ve been using the XM+ rx on pretty much all my builds because with an OSD fc you can change vtx settings from the OSD.  I was so excited to fly this quad I forgot on the KISS you need the SmartPort wire on something like the R-XSR to have the ability to change channels on the TBS Unify RACE via LUA script.  My plan was to get it flying then swap out the rx after…but it never go that far.  Keep reading to see why.

The KISS configurator looks pretty much the same as 2 years ago except with the addition of the Advance tab.

kiss fc v2 review

Let’s Start with the Good

If you can get it to fly correctly, yes, it flies great.  It has that super locked in KISS feeling.  Even on stock PIDs the quad felt buttery smooth and locked.  I didn’t have any oscillations and there was only slight prop wash on full throttle 180 turns.  I could tweak the rates to my liking and fly it as is on stock PIDs.  But sadly I didn’t even get enough flights with it to give a full in depth review.  I was able to only put about 5 packs on this fc.

On to the Bad

Strike One – The KISS fc doesn’t support BLHeli passthrough.  So unless you are using the KISS ESC, which are about $100 a set, you can’t flash, change esc settings or reverse a motor on the computer.  In order to connect to BLHeli, you have to first install the Aikon AK32 to a BetaFlight flight controller, changes your settings, remove the BetaFlight board then reinstall it to the KISSv2.  This is a major pain.  I ended up just reversing a motor the old school way by flipping two wires on the motor.

Strike Two – The KISSv2 is $70!  That’s almost double the cost of an F4 Betaflight board with OSD.  Is it twice as good as a BetaFlight board?  Does it fly twice as good?  No, I don’t think so.  I’ve been flying the RaceFlight RevoltOSD and it flies just as good and is only $45 with OSD.

Strike Three – This KISSv2 I had was super buggy.  I would fly a pack, land, change battery and when I try to take off it would do a violent flip as if I had a wrong prop, motor was spinning the wrong way or wrong board orientation.  I’d put on a new prop and it would fly fine for the next couple packs then do it again.  I know it’s not the wrong prop on the wrong motor because it would happen from just changing the battery and nothing else.  Not fun not knowing if it will take off or do the scary flip.

Sorry KISS, I’m on blood thinners for my heart condition.  If the quad decides to flip out and cut me, I could die.  I’m not risking my life for you.


As someone who sells and use to fly exclusively KISS flight controllers for about 6 months, I can attest that the KISS gear (flight controller and ESC) are the most problematic equipment I’ve ever experienced.  I’ve never had any luck transplanting a KISS fc to a new build.  Anytime I removed a fc and put it on a new build, there would be some issues.  Either an ESC would go bad or a channel on the FC would die.  I’ve had to replace more problematic KISS fc’s than pretty much all other flight controllers I sold combined.  No joke.

I really really wanted to like this board.  There’s that special flight characteristics that only KISS fc have.   A year ago when there weren’t as many options as we have today, I’d give this fc another try.

Sorry KISS fans, I don’t recommend this FC.  If you can get it to work properly, yes, it flies great.  But at $70 I’d expect it to at least work properly.  The new KISS fc v2 flies good but it seems like it’s still plagued with quality issues.  Save your money and go with something like RaceFlight.  It flies just as good, cost less and has been a tank in my PROton.

Next up, Helio Spring flight controller with ButterFlight!

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10 responses to “KISS FC v2 Flight Controller | Kick A$$ or KISS my A$$”

  1. Luke Avatar

    Mike that’s strange. I have 3 quads all flying Kiss V2 with Blheli32 esc’s and I have never had any issues. They all fly super smooth and crazy locked in once tuned. Altough they do fly great on stick pids. But I do agree with you on the down side of kiss not having OSD and not being able to flash or change setting on the blheli esc’s. At the least an OSD would be nice. As for as BF, there’s too much to set up, too much b’s just to get in the air imo. I stay away from BF. Lol.

    1. Mike Tseng Avatar
      Mike Tseng

      yeah kiss do fly great IF they work. i’ve just had too many issues with kiss. plus this new one is $70, a bit steep for me

  2. Chris Tepaske Avatar
    Chris Tepaske

    I must say I have never experienced the issue you mention in your post. Kiss has always been far superior then anything else on the market both in flight characteristics and ease of build.

  3. Anthony Avatar

    Have same flipping issue on a v2

    1. Mike Tseng Avatar
      Mike Tseng

      yup. go with the helio spring. flies just as good as kiss and has osd!

  4. Zaine Stapleton (BikeGuy) Avatar
    Zaine Stapleton (BikeGuy)

    You could always pick up a Furious FPV Piggy OSD V2 and get your OSD. I can change rates, PIDs, and set VTX channels and power outputs. Also on the power output, you can change it so when sitting idle it’ll be at 25mw or whatever you set it to. But when armed, it can change to a higher mW output depending on what you set the max to in the KISS GUI.

    That’s what I’ve got on my KISS 5” race quads that are also running the V2 FC and the new 4in1 ESC they came out with. I’ve got three of them in three of the five race quads so far (waiting on getting two more when I can get them to build up the last two quads so five quads total) and so far I’ve been flying the s*** out of them. No problems, they just do their job and simply work. The voltage rating for the 4in1 is in question since it’s rated as 2-5s. But, others have been using it on 6s with a external cap added on and they report it works. I’ll have to experiment with 6s low KV using a KISS V2 and KISS 4in1 combo.

    Keep in mind, not everything is perfect either. I get that not everything works 100% of the time. But did you try contacting the guys at Flyduino like you did when you were using the RF RevoltOSD and having issues with that FC? I’m sure if you contacted Flyduino they could have helped you out. They helped me out when I got a faulty 4in1 from them, they were super quick at getting back to me and sending me a free replacement to get me back up in the air.

    In the end, use what works for you. I’ve tried all four main FC firmwares/hardwares (KISS, BF, BuF, and RF/F1). BF for me works, but it’s a hassle to get it all set up and to go in and change the ESCs, etc.
    BuF same story as BF except it flies better out of the box than BF.
    RF/F1 for me seemed promising, but I could ever get the one RevoltOSD to work right. It would shakewhile hovering, and completely flip out in turtle mode for no reason.

    Not to be preaching KISS, but after trying out all of the different FC firmwares out there I keep going back to KISS. It just works for me and I’ve got a awesome six inch quad that is super locked in running on V2 with the 32 amp ESCs.

    Moral of the story, use what works for you. Just know that not everything will work 100%. And if it doesn’t, ask whoever made it for help.

    1. Mike Tseng Avatar
      Mike Tseng

      I get it, KISS flies great if you can get it set up. It just feels like KISS v2 hasn’t changed much from the original KISS fc. I’m so spoiled by beta and butter boards that come with osd and fly great nearly stock.

  5. JIANG BO YI Avatar

    I have the same problem as your strike 3. I found the problem is KISS FC V2 has weird sync with my XM+ receiver. If I don’t switch off the X9D tx, it works good. But, if you turned off the power of your tx, then change battery for your quad, turn on the tx. The violent flips may occur.

    1. Mike Tseng Avatar
      Mike Tseng

      yeah that’s unacceptable and very dangerous. The flight controllers like the Helio fly just as well as kiss and have OSD.

  6. Greg L Avatar
    Greg L

    Except that helio got buggier and buggier an then support just vaporized! I have mostly flown betaflight because I loved messing around with settings etc but then last month I built my first Kiss build- Apex with kiss fc v2 and kiss 4in1 esc- I have never felt a quad so incredibly locked in- so I built a second and am now working on a 6s one as well- so far so good technically. I’m also waiting on a 4in1 flightone esc and am going to build a flightone OSD copter to see how it compares… just having fun.

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