Is EXT Really the BEST Sur Ron Suspension? | EXT Ferro Fork Test and Review
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- Опубликовано: 22 июл 2023
- In this video, we test and review the new EXT Ferro Fork, highly regarded as the Best Bolt On Suspension for the Surron Lightbee X. Phase II of the Surron XX Upgrade Build focuses on EXT Suspension, Warp 9 wheels, and other Surron upgrade parts.
See below for a list of the parts mentioned in this video. [bit.ly/ECRParts]
EXT Ferro Fork: bit.ly/EXTFerro
EXT Arma E-MX Shock: bit.ly/EXTArmaMX
KO RS Motor: bit.ly/KORSMotor
KO Pro Series Controller: bit.ly/KOProController
EBMX 72v 42Ah Battery: bit.ly/EBMX72v42Ah
Warp 9 Custom Surron Wheel Combo: bit.ly/Warp9CustomWheels
Hayes Dominion Brakes: bit.ly/HayesDominionA4
Warp 9 54T Sprocket: bit.ly/Warp9ChainSprocketCombo
Warp 9 Linkage: bit.ly/Warp9Linkage
Warp 9 Handlebar: bit.ly/Warp9Handlebar
Warp 9 Bar Mount: bit.ly/Warp9BarMount
Warp 9 Stem Lock: bit.ly/Warp9StemLock
Warp 9 Triangle: bit.ly/Warp9Triangle
Warp 9 Warp Drive Kit: bit.ly/Warp9ChainDrive
4MF Surron Plastics Kit: bit.ly/4MFSurronKit
Warp 9 Foot Pegs: bit.ly/Warp9FootPegs
Warp 9 Foot Peg Mount: bit.ly/Warp9PegMount
Warp 9 Handguards: bit.ly/Warp9Handguards
Warp 9 Speedo Mount: bit.ly/Warp9SpeedoMount
Warp 9 Front Brake Rotor: bit.ly/Warp9FrontBrakeRotor
Warp 9 Rear Brake Rotor: bit.ly/Warp9RearBrakeRotor
Warp 9 Titanium Axle: bit.ly/Warp9Axle
Warp 9 Rear Disc Guard: bit.ly/Warp9DiscGuard
GritShift Skid Plate: bit.ly/HeavyHitterSkidPlate
Find Surron Electric Dirt Bikes For Sale: bit.ly/ECRMarketplace
For more tests and reviews on the latest electric motorcycles and dirt bikes, visit: ElectricCycleRider.com
Instagram: / electriccyclerider
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This build started in 2020 from a stock Sur Ron XX Ludicrous edition from Luna Cycle. The power increase on the Sur Ron XX made it a great candidate for an electric dirt bike build platform. The Original SurRon XX Build featued a Fox 40 Fork, FOX DHX RC4 Shock, Woodys Wheel Works 21"/18" Excel Wheel Combo and a bunch of other hard parts.
Since then, it has seen several variations. Being the first candidate to receive a 4MF Surron Plastics Kit. We temporarily switched the bike back to a Woodys Wheel Works 19"/16" Excel Wheel Combo.
In the previous build video, we removed the stock SurRon motor and replaced the motor with a KO RS Motor, which is paired to a KO Pro Series controller. This KO Combo will allow for a lot more power, tuning capability and better cooling for the powertrain. We ditched the Fox Shock and added the EXT Arma E-MX Shock and paired that with a Warp 9 1.5" Linkage while we wait for the .75" Linkage and Warp 9 Triangle. We fitted the Surron XX with a Hayes Dominion A4 Brake Kit. We also added Warp 9 Handlebars, GritShift Axle Blocks and a Warp 9 54T Sprocket.
In Phase II of this Surron build:
We swapped the Fox 40 fork for the New EXT Ferro fork.
Next we swapped the 19/16 wheel set for a Warp 9 21/18, with their 220mm oversized rotors.
We got the new V2 Warp 9 triangle installed, which is re-styled with neoprene washers to help keep dirt and water out of the pivot bearings.
We also swapped the Warp 9 1.5” lift linkage for the 0.75” linkage.
We changed out the magnesium Warp 9 bars for black bars, Warp 9 bar clamp, Warp 9 hand guards, and added the Warp 9 speedometer relocation kit.
We also did Warp 9 Pegs, Warp 9 adjustable foot peg mount and a Warp 9 titanium axle and rear disc guard
Last but not least, we’re trying out the new GritShift heavy hitter skid plate.
Before I went out for my ride, I set the sag on the shock using the Motool Slacker [bit.ly/MotoolSlacker]. If you don’t already have one of these, it’s an awesome tool to have.
I also set my EXT Ferro Fork to these settings based on my riding style and weight: 100psi in the main chamber, high speed compression 10 clicks from closed, low speed compression 9 clicks from closed, rebound middled out at 11 clicks and 150 psi in the ramp chamber.
The EXT Ferro Fork has impressed me overall and would recommend this as the best upgrade fork that is a bolt on replacement for the Surron or Talaria! 
Авто/Мото
See below for a list of the parts mentioned in this video. [bit.ly/ECRParts]
EXT Ferro Fork: bit.ly/EXTFerro
EXT Arma E-MX Shock: bit.ly/EXTArmaMX
KO RS Motor: bit.ly/KORSMotor
KO Pro Series Controller: bit.ly/KOProController
EBMX 72v 42Ah Battery: bit.ly/EBMX72v42Ah
Warp 9 Custom Surron Wheel Combo: bit.ly/Warp9CustomWheels
Hayes Dominion Brakes: bit.ly/HayesDominionA4
Warp 9 54T Sprocket: bit.ly/Warp9ChainSprocketCombo
Warp 9 Linkage: bit.ly/Warp9Linkage
Warp 9 Handlebar: bit.ly/Warp9Handlebar
Warp 9 Bar Mount: bit.ly/Warp9BarMount
Warp 9 Stem Lock: bit.ly/Warp9StemLock
Warp 9 Triangle: bit.ly/Warp9Triangle
Warp 9 Warp Drive Kit: bit.ly/Warp9ChainDrive
4MF Surron Plastics Kit: bit.ly/4MFSurronKit
Warp 9 Foot Pegs: bit.ly/Warp9FootPegs
Warp 9 Foot Peg Mount: bit.ly/Warp9PegMount
Warp 9 Handguards: bit.ly/Warp9Handguards
Warp 9 Speedo Mount: bit.ly/Warp9SpeedoMount
Warp 9 Front Brake Rotor: bit.ly/Warp9FrontBrakeRotor
Warp 9 Rear Brake Rotor: bit.ly/Warp9RearBrakeRotor
Warp 9 Titanium Axle: bit.ly/Warp9Axle
Warp 9 Rear Disc Guard: bit.ly/Warp9DiscGuard
GritShift Skid Plate: bit.ly/HeavyHitterSkidPlate
Find Surron Electric Dirt Bikes For Sale: bit.ly/ECRMarketplace
For more tests and reviews on the latest electric motorcycles and dirt bikes, visit: ElectricCycleRider.com
Killer build!!! Taking hints for my ErideProSS build! Thanks!
Great job on the video folks! Thanks for making it.
This build is absolutely epic.
I have a KO and I love it.
I have only had the Stock motor and the KO, So my opinion is not that of someone who has rode many aftermarket controllers.
With that said, I have mine in a tune that fits my needs and love that I can take more time to fine tune a wheelie mode and more.
The ability to make Trail Modes, Park Modes, Eco Modes, Race Modes and more is beyond words and is a Life changing in the Best of ways.
I recently met someone whom I consider a friend. they rode my KO and was kinda suprized in the best way.
They are a Master at wheelies on there Dirt Bike but could not handle the Tune I had set.
This is why I love the Ability to create Modes and think with the Right Tuning He would be wheeling to his hearts content!
I also Just Got that Fork, waiting on bearings for it then its ready to rock again!
Love this review and glad to hear some honest feedback on the KO and this fork!
Its not a Bad Motor or Controller imho, and as far as stock it just puts stock to shame.
With that said I love Surron/Segway/etc for allowing us to customize these bikes and give them new life on trails, street etc.
So I cant fully hate the Stock Bike but I think anyone who has a stock surron for long enough will be looking to upgrade.
Very happy with my setup so far and love the setup you have, Looks awesome!
Solid review man!
Looks great buddy 👍
im confident this is roughly the ideal ron build. that 4M body kit is so righteous.
sure confident 😂 not for street . heavy forks . nah
@@lifeisamovi umm...if you came to electric cycle rider for street riding, ur definitely in the wrong place.
@@kwent86 they couldn’t even make the build right . ran into some “ curve balls “ 😂😂😂😂🙄 i didn’t !
they arent heavy lol@@lifeisamovi
So many warp 9 goodies❤
That bike is beautiful
Be interesting as an off the trail ride
Are you going to review the Admit Jet? That looks like a cool trail bike.
Nice riding, are you really narrating while riding? I would have been breathing much more and I would think the bumps would screw up my voice. Seems smooth. Always loved my Rekluse and wished for no gears. My Tesla confirms the lack of need for gears, clutches etc ;-)
Should be easy to get the ext fork with a shim stack tuned for your riding style
Love the EXT Ferro and not just because I spent the money. I'm running same PSI you are and 11 clicks out on the rebound. Absolutely love it. My plan is to go with the longer swingarm in order to get it more planted.
longer swingarms are so cringe do you even want to be able to wheelie
@@ES-pt9te he doesn't even lift (the front), bro
That things fucking sick
⚡⚡⚡
Incredible.....simply incredible. The KO controversy is politics maybe? I'm thinking of getting a KO Fspec. motor for my talaria mx4 supermoto to match my warp9 custom SM wheel set.
did you have to do any mods to get the battery to fit with 4MF KIT?
⚡️💨
Comparison against the other surron forks?
Just ordered mine, lol not putting anywhere NEAR this much abuse on my bike, so- perfect
What tires are you running on the 18/21, thanks
Hello. How many acres you got there?
Could you give cost per part? And then total cost for the build? Looks awesome, but an expensive project.... Love it!!
He shows all of the links
likely between 12k and 15k
how long does the battery last with this setup?
How does this build compare to your other $13k surron build?
What about the KO rear swingarm that would be an awesome set up
If they fix the shitty and dangerous brake knob
@@surronzak8154They actually changed that. Since ± a month ago they use a different version of the swingarm with a new 'unbreakable' knob fastened with two screws instead of one. And everyone who has the 'V1' version swingarm can get a new upgraded/improved knob for free.
Very surprised you don’t put that much pressure in it. I’m way lighter than you and ++ chamber needs at the very minimum 200psi with the + one around 100 to keep this plus feeling we both like.
@MTO_Brothers Thanks for the note. My spec suggestions came directly from the test riders who work at EXT. Our specs aren't far off. We are both running the same PSI in the main chamber, you're just running 50PSI more in your ramp chamber, which is likely not going to make much difference on these trails.
How much do you weigh? What type of terrain are you riding? Where are your clickers set to? Could all make a difference.
Just so this doesn't go unnoticed, as a starting point, EXT suggests 65PSI in the main chamber (+) and 100PSI in the ramp chamber (++).
@@ElectricCycleRider EXT's suggestions are completely off. I'm 50kg (110lbs) so clearly on the lighter side and with their recommended baseline I was bottoming out playing in my garden (not really riding).
But yeah, many factors can influence this you're totally right.
@@MTO_BrothersAny possibility you mix d the chambers up? Something sounds very wrong.
I'd empty both chambers and refill. It's important to start with the correct chamber and it needs to always have more pressure than the upper. Otherwise top chamber having more psi will force the bike to bottom out. Hopefully you haven't done any damage.@@electric_things_
@@ElectricCycleRider hey I was wondering what your weight is I was trying to tune my forks just now. Thank you!
Hey guys I have a similar build except running the KO race spec motor, so a little more kv. I set my controller for 20 kw. My question is
I can't run the 60 sprocket, front end just lift up on anything above
Eco wich is 1 out of 5. I want to try a 40 tooth sprocket so I can actually use sport wich would 5 out of 1 - 5. Yes I know I can turn the power down to 18 kw or lower. But I want max top speed and lower end in sport setting.
Kind of crazy putting over 15k into an ebike.
Just looking for your input.
Thanks
Just change ur lower rpms to like 50% then ramp it up as move higher through the rpms. Easy to do with the app
I ride a 300 2 stroke now. We ride rocky, tight single track here in PA forest. Lots of clutch work, and average speeds in the technical sections, which is where the guys I ride with like to go, might be 5-15mph.
So with that in mind, how would this be in that kind of riding with no clutch? Also, we sometimes loop out, bikes slide down rocky hills, I’ve had rocks punch through my engine cases. Are there enough after market guards to protect it in that kind of stuff ?
Thanks
These aren't good for that kind of riding. They spin the tire too easily with no clutch. Ultra be may be better once you put on the 18/21" wheels but for now, can't beat the 2 stroke with a clutch. By the time you do all the mods, you are at Erzberg prices which makes zero sense.
@@midgetmoney1 Ok thanks for the info man. I’ll keep watching the segment. 👍
although I agree with you I've had amazing results riding with the X9K with the proper throttle calibrations, ramping and deadband inputs. I've been riding uphill small rocks (doll head size rocks) and just using the throttle for feathering@@midgetmoney1 tires are important as well because as you surmised it can break with the ground easily. I've been using a 58t sprocket and the results have been very respectable.
Would be nice to have a price tag on all these mods. Let us know what it costs to duplicate a build.
i’ll send ya one !
$17,000
Yeah expect 15k min including the bike
The forks are 2k
Few questions…
How tall are you and what’s your weight?
For single track riding, money no object, would you prefer an ultra bee at stock power but any other upgrade you want or a light bee with 12.5kw and any upgrades you want?
Trying to narrow down my purchase and am totally lost. Just sold my talaria mx3 to upgrade.
You are always better off with the bigger ultra bee. However, for my purposes I need to keep my smaller and like the better turning radius for riding through the city and running from police. It also doesn't look so much like a dirt bike.
But if you want the best offroad and onroad performance, than the ultra bee is the way to go.
Surron by name only. (Frame acknowledged) 19,000.00 bike?
How much does a full setup like that end up costing just out of curiosity? I’ve been waiting for the right time to replace my dirt bike with an electric one but always feel like we are not there yet.
I have over 15k into mine and it's a similar build
@@dajaduke1936 Thanks for the info bud! Rad setup.
You should look into a Stark Varg (not released yet, super long waiting list) or one of the more powerful Surrons like the Ultra Bee or Storm Bee. Depending on your needs it might make more sense to start with something built to be stronger from the ground up.
Yeah I guess I could sell the 20kw surron and bye a starg Varg, however I ride mine on the street legally with a pedal kit and a set of pegals. Plus no bike co. manufacturers a 140 lb bike with 800 NM at 20 kw. Weight to power.
@@jerkychew899 yep it's been on my radar since last year! I'm in no rush so wanted to see how the final product turns out before fully committing. Looks very promising though.
I will have your babies if you do vids on the "Frey beast" and "Dengfu E55"
! FAST !
Did yiu choose the flat crown or the drop crown?
Flat is for 19" it.. and drop for 21".. according to a few supplier sites I have checked too..
@zerokewl88 thank you! Appreciate that
Always the Best when it given for Free
Test before saying such a thing... It's really the best suspension for surron and the only one really made For
@@jowill.youtube No it is Not Ohlins USA is .Let me know when your over priced suspension Wins few competitions
@@SurRon-GLE Ohlins mountain bike suspensions are very bad on the lbx...
@@jowill.youtube LBX is an Electric Mountain Bike Most Definitely Not a Dirt Bike Stock .
@@SurRon-GLE That's why ext suspensions are the best. They're the only ones really suited to it. Crown thickness. Hydraulic management. Even ext is an incredible suspension brand
After trey made Surron Ultra, al these 2000$ mods for Lightbee seems senseless....
Always shocked how many surron folks use the fox40s as comparisons. The fox40 is one of the worst fork choices a guy could make for a light bee. These are NOT mtbs. Dh mtbs in today's day and age are sub 30lbs. Not one single mtb dh fork is designed to withstand or perform with over 100lbs of bike behind it. They will fail. Not if but when. They do fail often on surrons. ANY mtb front fork is a downgrade from stock if you got the kke setup from factory. The kke can imfact actually be tuned and setup to perform just as good as many of these high cost replacements everyone is wasting money on. My perfectly setup stock suspension works and feels 15x better then all 3 of boys built bikes with charged tuned forks on em, it's rather hilarious how little surron folks seem to know about the two wheeled industries.
Can you please guide on how to tune it to that level?
I run 4 Ko set ups, My bike , wife , son and brothers bike .
Never had a single issue , customer service is the best I have ever had from any company and our bikes are bullets !
Ima order a set of those forks now for sure , love ya bike broski !
That hate all comes from EBMX and they shitty low life way of doing business , dodging warranties especially that slimy Matt dude , creepy AF criminal been to jail for fraud and all just Google the clown .
KO is cheaper to buy they Rush controllers has way more power than that X9 thing and KO got a 3 year warranty .
My buddy got the X 9 it been shipped back twice cause it bricked itself and now the wires are pulling out the back of it , he posted in they group about it and they deleted it .!!!! I would run Fardriver or a pedal kit before I gave EBMX a cent of my money !
why buying KO if you can buy fer driver, it's basically the same, just better than KO