St2 SystemsReviews of st2-systems.com

Purchased unit for BMW R1250GSA. Install was easy. Applied brake and it flashed as stated BUT no taillight when brake was off. Contacted "support". I was informed the unit was defective so they sent a replacement. Installed that unit with same results. No advice as to what the problem is.

Rubbish. They don't use an accelerometer and motion detection sensors combined with a proprietary algorithm. It's a mechanical switch. Not working! don't buy!!

I bought the brake assist module, which looked great. What turned up was a tilt switch in a box, which makes a loud 'click' when it goes over a certain angle. If you shake it, it literally rattles and flashes your brake light on and off. It you turn up upside down, the brake light stays on. Somehow, you're meant to fix this inside your bike at the 'exact' angle needed (this is what they call sensitivity adjustment) with nothing but a sticky back pad to fix it. Support responded in a couple of days, confirmed there are TWO VERSIONS of the unit and the 'digital' version costs $128 (I paid £50, discounted from £70). Nothing on their website says they have two versions, their reviews are all talking about the 'digital' version, so this is a bit of a scam. The cheap/basic version doesn't flash it you put it upside down, the tilt switch activates and your brake light comes on. Once I found this out I asked for a returns label and for a refund, then all of a sudden I stopped getting replies from the support team. They post these things out from Slovenia and expect you to post it back AT YOUR COST, hoping no one bothers and just accepts they were conned. I would suggest you avoid this company, my experience is they're dishonest by not being clear what you're buying and the product they actually send you is is a £3 tilt switch in a box, at best. Edit: I actually got a refund in the end as I raised a PayPal refund request. But to be fair, although slow, support did send me a returns label. Seems to got a luck escape..

I fitted an ST2 strober unit to my 2016 Triumph Trophy as per the instructions and wire coding. It didn’t work at all and worse than that left me with a load of issues to sort out. After reconnecting the two existing cables that had to be cut I was left with rear indicators that stayed on when the rear lights should be illuminated, no rear lights at all and when I indicate it flashes at double the relate it should as if there’s a bulb fault. The wiring is exactly as it should be, I’m left with these faults and no concept of how to get cure them. Stay away from any of these units as they can corrupt your bike electrics like they have mine.

i did not read any reviews when i ordered mine, ,,,,but i wished i had when i looked at the Brake module that was promoted on Facebook i was impressed, i did a compatibility check all was good, something to think about i thought, then every other email i had was pushing me to buy it , even at a reduced price, so i did buy, i fitted it as per instructions, but could not get it to do as it was supposed to it was dangerous, tried to get in touch no answer, tried again after waiting a week, eventually got the support team they asked what the problem was although i had told them in every email i sent , since then no reply ,,,,so as i had paid by card my bank refunded my money, that was two months ago and still no reply from their support team ,, if you are thinking about buying from st2, i would think again,,,

I bought the ST2 System Brake Module that was supposed to flash when you downshift. It did not work except under very hard downshift, but did flash almost constantly due to vibrations of the motorcycle. It cost me $17.95 to return since it was going overseas since there is not a distributor in the USA.

Avoid, avoid, avoid. I bought the brake module for my 2019 BMW S1000R after going through the compatibility wizard. I was informed by support email it would work. It doesn't. Although it flashes when braking, it stops your lights from working, which causes system errors. I raised a ticket, no response. Please avoid.

Only interested in selling. Can not even answer an installation question.