Need Help - FarDriver Controller Cutting Out on Jumps

VINSANITY · Sep 14, 2025

Hello,

I have a FarDriver ND961000 controller on a 96 volt conversion I built.

Unfortunately the controller cuts out after I hit the face of a jump under heavy load (it cuts out mid air) - after you come to a complete stop it resets and you can ride again.

All other riding is normal like hard acceleration or hard braking.

I’m stumped, I have two batteries and it’s the same problem on both.

It happens when I lower total power as well.

There is no error codes stored in the FarDriver controllers so no way to trouble shoot.

Any ideas would be appreciated.

Philip · Sep 15, 2025

Ouch! This must be some overcurrent protection. Scary! I remember @DonCox had that on landings, which is not as bad as on the face of the jump.

VINSANITY · Sep 15, 2025

I was able to get the controller tuned by a FarDriver specialist named Ryan Goodyear.

I bought the controller from E-Conic cycles which is a US based seller that offers post sale service, they connected me with Ryan.

The settings on FarDriver controllers are not intuitive and certain settings are very critical.

Nice controller in the end, very smooth power delivery.

DonCox · Sep 15, 2025

Thanks for the reference Philip, but Vinsanity and I have been talking for quite some time about this problem and others. My Far Driver Controller experience is limited. So Ryan Goodyear is a good answer. I corrected my problem on my Votol EM260S controller by replacing it. There must have been loose nuts and bolts inside of it.

Philip · Sep 16, 2025

DonCox said:
I corrected my problem on my Votol EM260S controller by replacing it. There must have been loose nuts and bolts inside of it.

HadesOmega · Sep 19, 2025

Yeah that's why I ditched my fardriver controller the tunning app was not easy to use. I sounds like Phillip is on to something. It could be when you spinning up the rear in the air it's tripping some kind of protection. I remember my QS138 would be screaming when you were getting the RPMs up. Anyway maybe try lowering the field weakening maybe?

VINSANITY · Sep 19, 2025

Thanks for the feedback, who did you buy your EBMX controller from, also do you know if it can be used on a 96volt system. Appreciate you commenting.

HadesOmega · Sep 19, 2025

I got my X-9000 V2 from Gritshift. The V2 will not work with 96V because it wouldn't work with my 84V battery. EBMX said there wasn't enough headroom for the V2. 81V nominal is all the V2 can handle. Suposedly the V3 can operate up to 120V so I would think it can handle 118V the voltage when the 96V is fully charged.

I will msg EBMX to doublecheck. I don't know if they have V3 QS138 harness yet also

HadesOmega · Sep 19, 2025

Their answer:

26s is Max. 109.2v fully charged.

The QS harness is available.

So no it won't work with 96V =(

VINSANITY · Sep 19, 2025

Oh great my battery is 26S / 109 volt max - how do I contact GritShift - I put a message via there web site but they didn’t respond.

HadesOmega · Sep 19, 2025

Oh haha my math was off 96+12= 108

Somehow I thought it was 118.

Gritshift is in Florida so they might be closed right now. I don't see the V3 harness. The V2 and V3 are not compatible.

What I did is buy the Light Bee kit and then the QS race harness. But remember the V2 ism"t compatible with the V3.

EBMX Surron Lightbee X9000 V3 Controller Plug N Play Kit

The V3 X-9000 Power Kit is not just an upgrade; it's a transformation for your Sur Ron Lightbee, delivering unmatched power, control, and customization to enhance your riding experience. This controller kit for Sur Ron Lightbee is engineered to maximize your ride's power and efficiency. Whether...

gritshift.com

EBMX X-9000 Race Harness For QS138

Got a full-size bike or custom build running a QS138 70H or 90H? EBMX has you set with a custom wiring harness for the QS motor with an X-9000 ignition switch & throttle input plug designed to fit a YZF450. This will fit most full-size 125/250 and 450 bikes designed with a rear-mounted...

gritshift.com

VINSANITY · Sep 19, 2025

Thanks much, I’m going call them first to double check on my application.

HadesOmega · Sep 19, 2025

EBMX tells me Charged Cycle Works should have QS harnesses for the V3 controller soon.

DonCox · Sep 20, 2025

Hey Vince, there was another thread on here about the EBMX x9000 V3. The contact over there is a friend. Bridger Hombreverde at support@ebmx.com he has a KTM Freeride with a QS138 70H V3 and the X9000

VINSANITY · Sep 20, 2025

Hey Don, thanks for the heads up about the EBMX connection. I haven’t fully tested the FarDriver, it appears the tuning worked but I haven’t tortured tested it yet. If it’s still having issues I will have to go the EBMX route.

HadesOmega · Sep 29, 2025

I was browsing Gritshift and they have the V3 QS138 harness but it on pre-orer

EBMX X-9000 V3 Race Harness For QS138 Motor

EBMX X-9000 V3 Race Harness for QS138 70H/90H – plug-and-play wiring for custom builds & conversions. Pre-pinned, app-ready, and built for the X-9000 controller.

gritshift.com

VINSANITY · Oct 2, 2025

After multiple tuning sessions with Ryan Goodyear, I ran the auto learn function a dozen times and unlocking the controller it finally works without cutting out. Problem is I don’t trust it, if the controller cuts out at the wrong time it could the really dangerous.

Bike has really good usable and smooth power, very fun to ride.

Thanks all for contributing.

Need Help - FarDriver Controller Cutting Out on Jumps

VINSANITY

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Philip

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DonCox

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Philip

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HadesOmega

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VINSANITY

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HadesOmega

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HadesOmega

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VINSANITY

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EBMX Surron Lightbee X9000 V3 Controller Plug N Play Kit

EBMX X-9000 Race Harness For QS138

VINSANITY

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HadesOmega

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DonCox

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VINSANITY

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HadesOmega

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EBMX X-9000 V3 Race Harness For QS138 Motor

VINSANITY

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