stark varg ex supermotard

[davos2410]

Hello
I'd like to convert my Stark Varg EX to a supermotard when I receive it.
It would be for street use.
What parts do I need?
How many teeth does the included sprocket have? I've seen that they recommend 47. Would it be necessary to put on another chain, or would simply tightening it be enough?

 

[Jasperfield]

I would use the stock EX sprocket (and therefore the stock configured chain), the motor won't know the difference and they will work fine. Warp9 wheels will work with the new wheel spacers & axles so you won't need to change anything. You'll use the original levers & master cylinders, too, but you will need to install the warp9 front disk & caliper bracket that comes with the warp9 wheels. Also, trim the plastic fork tube guards a wee bit to prevent interference with the tire. I discussed this with a Stark representative when the EX was first made public.

 

[Karinshi]

I would use the stock EX sprocket (and therefore the stock configured chain), the motor won't know the difference and they will work fine. Warp9 wheels will work with the new wheel spacers & axles so you won't need to change anything. You'll use the original levers & master cylinders, too, but you will need to install the warp9 front disk & caliper bracket that comes with the warp9 wheels. Also, trim the plastic fork tube guards a wee bit to prevent interference with the tire. I discussed this with a Stark representative when the EX was first made public.

I talk to warp 9 about supermoto wheel build and they said me this: "Regarding your question about the Stark Varg EX, we currently do not have specific fitment information for that model since it hasn't been officially released yet. While we believe the fitment should be similar to the motocross version, we cannot guarantee it at this time."

I think is the same for the MX so we shouldnt had fitment problems with the EX, i will order the wheels when my bike arrived.

My concern is that i dont know if i should do tubeless or not, tubeless is okey but i dont want to change the liquid every 2/3 months

 

[Karinshi]

and i will choose 40t sprocket, you only live once! jajaja i want top speed and lower rpms so the motor doesnt work as much on the straight lines streets

 

[FYR]

and i will choose 40t sprocket, you only live once! jajaja i want top speed and lower rpms so the motor doesnt work as much on the straight lines streets

I run a 15t/45t sprocket combo when I use my SM wheels. Be aware that the chain guides will wear quicker when you run smaller rear sprockets.

 

[Karinshi]

I run a 15t/45t sprocket combo when I use my SM wheels. Be aware that the chain guides will wear quicker when you run smaller rear sprockets.

thank you for the answer my friend. Top speed it's very important to me with the supermoto set up, have you try your top speed with the 15/45? i'm thinking for a 14/40 set up, maybe i can reach 100mp/h or 160km/h... definitely 17 inch wheels cuts the top speed

 

[FYR]

Then you will also want the large front sprocket. 15t is about as big as you can go without serious modification. And even then, you have to massage the internals of the sprocket cover just a bit.

No, I have not pulled any high-speed runs on my 17/17 setup yet. I had barely gotten those wheels all fitted up perfectly and then my new 18/21 dirt wheels arrived, so I switched over to them.

 

[Karinshi]

Then you will also want the large front sprocket. 15t is about as big as you can go without serious modification. And even then, you have to massage the internals of the sprocket cover just a bit.

No, I have not pulled any high-speed runs on my 17/17 setup yet. I had barely gotten those wheels all fitted up perfectly and then my new 18/21 dirt wheels arrived, so I switched over to them.

The thing is, apparently the EX model, which is the one I just bought, comes in a 12-tooth size, and Stark Future doesn't currently sell 14 or 15-tooth sizes online, only for the MX model. But I'll find a solution and try to use 15/40. I don't mind if the rubber on the chain guide wears out sooner; they sell them online for 25 euros. If you do any top speed tests, I'd really appreciate it if you could let me know. Thanks, friend.

 

[FYR]

Hmmmm, you say that Stark only offers... a "12-tooth size", for the OEM spec' EX version front sprocket? That's very interesting. For the Varg Alpha 80, all I ever saw offered by Stark was 13, 14, & 15 tooth versions. Of which I have them all. Currently I run 13t front and 49t rear (note: KTM sprockets work for both front and rear of the 2024 Varg Alpha) with 140/80-18 rear tires and 90/90-21 front tires. I would think (or guess) that Stark kept the drivetrain interface the same for 2025 EX and MX versions, but cannot confirm because I will not buy a new EX.

 

[Karinshi]

Hmmmm, you say that Stark only offers... a "12-tooth size", for the OEM spec' EX version front sprocket? That's very interesting. For the Varg Alpha 80, all I ever saw offered by Stark was 13, 14, & 15 tooth versions. Of which I have them all. Currently I run 13t front and 49t rear (note: KTM sprockets work for both front and rear of the 2024 Varg Alpha) with 140/80-18 rear tires and 90/90-21 front tires. I would think (or guess) that Stark kept the drivetrain interface the same for 2025 EX and MX versions, but cannot confirm because I will not buy a new EX.

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You are crazy! 13/49 is incredible acceleration jajaja yo dont even need to have a front wheel installed, wheelie all day!

Yeah thats what i dont know, if they change the drivetrain interface... i dont think so, it doesnt makes sense... But on the website, in the EX section, there is no option to buy another front sprocket size other tan 12t.

Also they seem different to me:

EX:





MX:



Maybe they dont want people to change the size on the EX for some reason.

I will buy KTM ones if i get mad jajaja

 

[FYR]

You may be hard pressed to find a 36t rear sprocket, which is what you would need to match a 15/45 combo if the EX only has a 12t front sprocket option. And, for sure, you would have to shorten the chain.

With all the torque and HP that the Varg electric motor produces, I'm a little surprised at Stark's 12t spec'. That said, my 13/49 has really woken up my bikes throttle response over the stock 14/47 setup. I may just seek out a 12t front just to see what it does for that response.

 

[FYR]

HA! I just ordered a 12t front sprocket

 

[DaveAusNor]

Yeah thats what i dont know, if they change the drivetrain interface... i dont think so, it doesnt makes sense... But on the website, in the EX section, there is no option to buy another front sprocket size other tan 12t.


Maybe they dont want people to change the size on the EX for some reason.

Just go to the MX parts page and buy the other sizes. The parts codes are the same anyway, I would expect them all the fit both bikes from 12-15t

 

[Erwin P]

The thing is, apparently the EX model, which is the one I just bought, comes in a 12-tooth size, and Stark Future doesn't currently sell 14 or 15-tooth sizes online, only for the MX model. But I'll find a solution and try to use 15/40. I don't mind if the rubber on the chain guide wears out sooner; they sell them online for 25 euros. If you do any top speed tests, I'd really appreciate it if you could let me know. Thanks, friend.

On the MX KTM sprockets fit. So you have the range of 12-15.

I dislike the Stark ones, they are aluminium with holes drilled tru. They wear very fast and i know some people who actually were able to break them in 2 on hard landings with open throttle, in 1 case bending the drivertrain axle by locking up the chain.

I always buy aftermarket steel ones. Longer lasting, not breaking and cheaper.

 

[Karinshi]

HA! I just ordered a 12t front sprocket

honestly it doesnt makes sense to me to have a 12/49 gear... it will be uncontrolable, go and buy some wings my friend jajaja!

 

[Karinshi]

On the MX KTM sprockets fit. So you have the range of 12-15.

I dislike the Stark ones, they are aluminium with holes drilled tru. They wear very fast and i know some people who actually were able to break them in 2 on hard landings with open throttle, in 1 case bending the drivertrain axle by locking up the chain.

I always buy aftermarket steel ones. Longer lasting, not breaking and cheaper.

for what i can read on Stark website the front spocket it's made of chrome-plated steel not aluminium, they should last... bad luck for those guys who broke theirs i guess

 

[Erwin P]

for what i can read on Stark website the front spocket it's made of chrome-plated steel not aluminium, they should last... bad luck for those guys who broke theirs i guess

That happened on the early MX models, maybe they moved away from aluminium after some of those incidents. Stark is quitte good at taking lessons from failing parts.
Anyways, it has been common practice by the local Stark riders now to just move onto aftermarket ones.
Same goes with the tubes. The first ones really sucked and lasted about half a training session. I recently bougfht a new wheel and removed that tube directly. It was however much thicker and had a protection on the spot of the rimlock (were the first ones were punctiored). So maybe their product is fine now, but we came up with solutions to that and stick to that.

 

[Karinshi]

That happened on the early MX models, maybe they moved away from aluminium after some of those incidents. Stark is quitte good at taking lessons from failing parts.
Anyways, it has been common practice by the local Stark riders now to just move onto aftermarket ones.
Same goes with the tubes. The first ones really sucked and lasted about half a training session. I recently bougfht a new wheel and removed that tube directly. It was however much thicker and had a protection on the spot of the rimlock (were the first ones were punctiored). So maybe their product is fine now, but we came up with solutions to that and stick to that.

Yeah i saw that tube topic on an interview with the CEO Anton Wass, he said that the old tube sucks, it was a problem with the suplier, they end the contract with them and make their own new tube wich is now much better. Nothing wrong on buying thirds party's of course. I will do the same when i punctured mine. For the sprockets i think i will stay with the stock set up for enduro and i will buy a 15t on the website (MX model should fit, if not, its a 15€ lost) for when i do the supermoto set up from time to time, and i will start with a 40T on the rear and i will see if i need another size.

PD: No one is talking about how incredibly cheap all parts are on stark website in comparison with the general market. Minus battery, motor and drivetrain but thats expected.

 

[DaveAusNor]

yea the parts are generally well priced. Cant say the same for the hoodies

 

[Erwin P]

yea the parts are generally well priced. Cant say the same for the hoodies

Well they got the important bit right didn't they...