X9000 vs Bac 8000 vs KO Pro & Fspec|| What should you buy 

nice one lads, cheers well rounded vid

You guys need more subscribers, viewers and sponsorships. Your content is top notch and I can only imagine the quality if you were sent all kinds of parts for LBXs, Ultra bees, etc. Really the best and most indepth ebike content on RU-vid!

My experience is the same. The X9K is very controllable when doing slow technical climbs over doll head sized rocks. That was the standard I used as a comparison add to that the electronic design made the x9k an easy decision. I am still quite pleased with my decision.

Sweet video guys! I am rocking the Sotion/Fardriver ST721000 (500line/1000phase) on my new build paired with the FW01 and I am super excited to see how it performs. They also have a 96v coming out soon and I am most DEFINITELY throwing that on there when it does. Thanks for these videos! Btw, great song choices during the montages! Got me adding some new guys to my library!

The X9000 is our favorite as well. The KO shines over the BAC. It’s nice that we finally have some good options that were actually built for the bikes, no more farm equipment controllers on my bikes 🤘🏻

Reliability! Is key while providing excellent smooth power .! X9000💪🤷‍♂️

Great video. Do you guys run the regen thumb throttle? Besides the benefits, any issues like motor or controller get hotter when using it?

Of course X9000 won! Not for looks...not that I really care about that. It's VESC...of course it's the best. KO uses FAR Driver limited FOC motor control and VESC is full on FOC on a proper CPU that can run the full FOC suite. I have to ask...what throttle mode were you using on the BAC8000 and x9000???

Im new to the Sur Ron/Talaria world. Ive been watching a ton of videos to try and inform myself on controllers/batteries/motors. Seems like most people are running the BAC 4000. Whats the difference between the BAC 4000/8000? Of the KO, BAC, and x9000 which is the most user friendly with a chi 72v battery? Also can they be run with a stock sur ron or talaria motor - or do you need an upgraded ko motor? Ive seen a ton of videos of stock sur ron motors running upgraded controllers (mainly BAC 4000)/ 72v batteries using stock motors with no issues. Sorry for all the questions, just trying to educate myself - thank you!

Thanks man

I give an electrical engineers point of view and as you can see the X9000 proves it's better. I tell you what's best based on good electronics design.

amazing video!!!

would have loved to see the test rides done in a blind test with the controllers covered somehow, just for another layer of quality testing.

One thing this comparison doesn’t mention is that neither one of these bikes batteries is enough to get the max out of a BAC 8000 which is why a controller that doesn’t require as much power would perform better but if you got that BAC8000 the amps it needs it will destroy them both on power so what packs are these bikes running I have a 20s16p molicel pack and it’s barely enough for 32kw it really needs like 25p at least 20p 1000 discharge to run comfortably

So I’m gonna be getting a CS20 from Estrapz. The motor is 12000w, and the battery is 72v, so the top speed is 75mph, and the max rang is 55 miles, what would you recommend?

Great video idea from the double headed fellas from taz! I have zero experience with KO but a lot of experience with far driver. The best I could get my far driver to feel was around 80-90% of how the bac felt. The Bac feel would be around 80% of how my X-9k feels. Throttle to Ground feel that is. My Bac definitely benefited from using a magura throttle. Not sure why but the 0-5k pot just seemed to work a lot better. The X-9 is the only controller I would recommend for the Surron now with out a doubt. The only down side of the X-9k is the cabling apart from that it’s all thumbs up from me

That’s so weird cuz I have a ko nano and I absolutely love how smooth my throttle is. Don’t know how yours feels bad. Haven’t rode a x9k but my Ko is amazing

Y’all both have upgraded wiring? Love the music once again. I’m gonna go ahead and get that domino throttle to help my KO set up out.

Iv got a bac8000 and iv got a buzzing sound coming from the bike what could it be HELP !

My ko pro rips. It has no problem keeping up and beating bac. Of course it's a Talaria and the others are surrons.

Do you think you’d get better range with the X9000?

what about torp 500?

I have a KO and pushing 72v 18kw no problem 16" supermoto. Bike rips only thing I needed to do was upgrade the belt drive or whatever that cheap one is that Comes stock. I stripped the belt and bent the stock rims' first day shredding. I love you all videos, man. I use your guys' ko tune, too. It works perfectly between eco and sport mode, haha also I have the alto throttle. That shit way better than the domino!!

What about the torp tc500

Curious how the Nucular 24F would do in this comparison.

Hey guys can you put the x9000 into the xion e-bike?

09:30 Hill hold assistance ain't important in my book. Your bike got brakes? And an added bonus of using brake rather then sending current into the motor is that you are not increasing motor temperature at standstill. I can't really see I would be using that feature much, definitely not important enough to switch controller. And if that is the only factor differentiating between two controllers I would swing either way if I was to buy a new controller today. For some it might be a nice to have feature, but I doubt it will be a need to have feature. How is the firmware/software for X9000? Is it all locked like on the stupid BAC's or can you easily make changes to fit your need without getting in touch with a dealer? What about the KO Pro software? Having full control over all parameters in the controller is likely the most important thing to me and is why I Sold the Bac so rapidly.

Francis Janssen just taken a look at the video - really good. BUT concerning the ASI BAC8000. I think there’s light years of difference between between what customers receive from different vendors. The controller should come plug n play, although may need a little calibration as SR are not all the same “out of the packet”: throttle and phase angles as the factory keeps pumping out inconsistent bikes. The controllers should come with a decent mounting system. Ours come as with heavy duty mounting wings (we’ve upgraded this design three times in the last year). Strong mounts, heavy duty phase cables and waterproofing. We use 6AWG cables, our looms are proprietary to us (NOBODY) else has them. There’s little secrets to our looms which keeps the water out. We also supply a simple but 13 page install instructions (loads of photos). Horrified in the vid to hear “cable ties” and see electrical tape - NEVER! Take a look at the photos and video. Take a look at our site and see the extra photos: www.electroncycles.co.uk/product/asi-bac8000-for-sur-ron-with-loom-display-mounts-fully-assembled-and-programmed/

Can’t say it’s 100% true, but Chinese companies do not seem to have a problem with lying and knock-off products. Just normal business practice.

Why would there ever be a time when you don’t have breaks? I feel that was a bad take as you would never ride with dead brakes. That’s not a thing

Are you using torque or speed throttle on the X9000? You don't have the option for anything from KO. All you get is speed throttle. It will be more twitchy as a result.

THE HILL CONTROL WILL BE HUGE FOR ME. SO ANNOYED WITH MY KO ON THAT FRONT.

I see that Talaria in the background.

How does x9k handle deceleration on field weakening when motor is above rated limit? Ko tends to jerk slower with max field weakening.. wondering if x9k has that too

Probably it's bcuz of extended swing arm

You shouldn’t buy an overpriced fardriver rebrand for sure 😂😂😂

I think it all just comes down to rider side I’ve seen people on bacs smoke x9 guys all day..

What's holding me back is that all the product descriptions say it's only for dirt bike riding and I don't do that. I street ride and want top speed runs etc. Which should I buy?

And remember faster doesn’t mean better 😂😂😂😂😂

U 2 look like the cutest couple 4 the LGBT community how cute 🤣

Where are real tests? Its is only talking.

I have had all 3 and I’ll tell u now regardless off what these guys are saying bac is most reliable full stop then ko ebmx coming in last with all firmware hard ware updates what a nightmare error 02 cutting when battery is on 60volts error 02 over vault I can go on and on made me sell my bike that kit did ko was too snappy but very reliable and never let me down but the good old bac is the best all rounder hands down depending who’s tuned it and if u have egg rider over the asi scree. @surron_Parts_leeds