CYC X1 Stealth (NEW)

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Alfie   100 mW

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CYC X1 Stealth (NEW)

Post by Alfie » Feb 05 2021 12:52pm

CYC X1 Stealth

Stealth (Hero 1)_254.png
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I just stumbled across this: https://www.cycmotor.com/x1-stealth

It looks interesting, does anyone know anything else about it?
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Tommm   100 kW

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Re: CYC X1 Stealth (NEW)

Post by Tommm » Feb 05 2021 2:33pm

Glad to see the cog is very close to the motor cog.
My problem with x1 standard bracket was that it is so long there isn't any space on the downtube left for a downtube battery.

asterixorobelix   1 µW

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Re: CYC X1 Stealth (NEW)

Post by asterixorobelix » Feb 15 2021 1:10am

Has anyone on this forum done any pre-release testing of this motor? I am very interested in it, but a bit concerned about noise.

rheo   100 µW

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Re: CYC X1 Stealth (NEW)

Post by rheo » Feb 27 2021 5:36am

Also following with interest. I like the look of this one

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Raphi86   1 µW

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Re: CYC X1 Stealth (NEW)

Post by Raphi86 » Feb 28 2021 2:27am

Hey, i Preordered the stealth yesterday, to do a exchange with my bbs02b. Hope for a better paddeling assistance with the torque sensor of this motor -> i dont like the on/off switch feel of the bafang motors :? Some smoother transition like a modern Bosch motor would be great (I dont use any thumbthrottle or something like that)
Also waiting for some userreviews, never the less any footage of this motor. :wink:
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juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » Apr 14 2021 6:01am

Hello, does anyone know if I can climb steep and continuous hills without pedaling and not cutting? Does it get very hot? Thanks

Tommm   100 kW

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Re: CYC X1 Stealth (NEW)

Post by Tommm » Apr 14 2021 9:56am

juanjo wrote:
Apr 14 2021 6:01am
Hello, does anyone know if I can climb steep and continuous hills without pedaling and not cutting? Does it get very hot? Thanks
This is an outrunner motor, no way to cool the windings. Basically a hub motor, without ferro fluid. So continued high load is a no go.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » Apr 14 2021 10:24am

I don't quite understand what you are saying, is it not possible to climb steep and continuous slopes?

Tommm   100 kW

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Re: CYC X1 Stealth (NEW)

Post by Tommm » Apr 14 2021 12:39pm

juanjo wrote:
Apr 14 2021 10:24am
I don't quite understand what you are saying, is it not possible to climb steep and continuous slopes?
It depends on a million things. One persons steep is another persons almost flat, one persons slow is another persons fast.

The only thing I am writing here is, in addition to the stealth being a smaller motor than the PRO (which means it has less heat capacity), because it is an outrunner, the windings aren't getting cooled from the motor wall like the PRO, cyclone, bafang mid motors, etc., which makes its heat shedding ability AND heat capacity lower than pretty much any mid motor for sale (maybe outside tdzs or what it's called).

For this reason if you are looking to use it as a motorbike (throttle only) on a difficult terrain (long uphills) I would recommend against this motor.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 5:31am

So what problems will I have if I go up steep and long slopes with only the accelerator? Will it give me cuts?

Tommm   100 kW

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Re: CYC X1 Stealth (NEW)

Post by Tommm » May 06 2021 7:53am

juanjo wrote:
May 06 2021 5:31am
So what problems will I have if I go up steep and long slopes with only the accelerator? Will it give me cuts?
Cyc motors have a heat sensor in them. If they function properly for a new motor or not is unknown. The asi controller they use has both a temperature rollback and a cutout. So as it gets hotter it will reduce power and then eventually cut out. It should return to working order after it gets below the cut out limit.

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neptronix   100 GW

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Re: CYC X1 Stealth (NEW)

Post by neptronix » May 06 2021 9:46am

I'd be interested in it if it didn't have a crazy wide Q factor and could be used on a 68mm bottom bracket.
I always wanted a smaller version of this high efficiency drive. But the low biomechanical efficiency that overly wide pedals creates keeps me away.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Heavy duty Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:19am

I have talked to jon chan and he told me that they have tested the engines on inclined slopes,cyclone,bafang,bbhd,and he told me that the one that heats up the least is the stealh,according to jon chan the engine loses efficiency at 80 degrees and at 90 degrees it cuts.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:24am

i have spoken with jon chan and his answers are as follows

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:25am

Thanks for your message.



The X1 Stealth has 150 N.m. of torque & will get you up slopes using throttle only, no problem. I have personally driven it on a very steep slope using throttle only, and it was very good. As for temperature, the programming is set to start limiting the power at 80° C & will cut out at 90° C. Even though the system can withstand temperatures above 150° C, we’ve set these limits for safety.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:26am

If you do not have heating issue with our GNG kit then the X1 Stealth is also unlikely to heat up to its protection level.
The thermal performance at the same long steep hill we tested, with GNG2016 and X1 Stealth, the heat accumulated is similar. So I am quite confident that you will never get the X1 Stealth overheat in your loading condition.

We did the durability testing in harsh loading condition on our loading bench so we know the capability of the motor. The X1 Stealth has a higher efficiency so it can handle the same power in much smaller form factor.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:26am

Even without temperature sensor, the X1 stealth will not burn in the same loading condition as the GNG motor. They have similar thermal performance. If you cannot get the GNG to heat up, then you cannot also get the X1 Stealth to heat up. So at the same loading condition, the motor will not cut at all.

The temperature sensor is an extra precaution. So the motor will never burn down if you really pushing it to the limit.

X1 Stealth will be start shipping the first batch in later this month. And you will see reviews coming up soon.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:27am

All motors will get hot under continuous high loading. But if you keep X1 PRO at its correct gearing, you will hardly get the X1 PRO to heat up.

We have the Cyclone and BBSHD running side by side over the same loading condition. X1 PRO is the last one to heat up and this is because of the efficiency and performance.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:28am

We have tested in continuous steep slopes and the motor does not heat up. The BBSHD next to it has already been heated up quite substantially.
Therefore, under the same loading condition, our motors can sustain the most power for the longest period of time.
Comparing to the common high power mid drive: Cyclone, BBSHD, Tangent, etc. X1 PRO has the best thermal performance as we learnt from our customers and in-house testing.

We are sure about this as we know our system deeply.

In real life situation, we seldom got the motor to heat up even with continuous steep slopes.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 06 2021 11:29am

these were their answers draw your own conclusions

Tommm   100 kW

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Re: CYC X1 Stealth (NEW)

Post by Tommm » May 06 2021 1:55pm

As a reference point, the 3000w cyclone we all know, it does fine around 1600-2000w continuous depending on outside temperature.

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neptronix   100 GW

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Re: CYC X1 Stealth (NEW)

Post by neptronix » May 06 2021 2:51pm

juanjo, thanks for the information, but please don't turn one message into 8 messages in the future!

I would expect his statements to hold true because the CYC mid drives are the only ones that use properly thin 0.2mm laminations.
"Love and compassion are necessities, not luxuries. Without them, humanity cannot survive." - Dalai Lama

My first major build: 1.6kW 8T MAC motor on a Trek 4500 MTB.
Monster MTB: Leafmotor 1500w @ 4kW on a Turner O2 full suspension.
The monster scooter: Heavy duty Cannondale semi recumbent - under construction.
Blue Dream: Maxaraya FS semi recumbent and high efficiency mid-drive - under construction.

john61ct   100 GW

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Re: CYC X1 Stealth (NEW)

Post by john61ct » May 06 2021 9:47pm

Tommm wrote:As a reference point, the 3000w cyclone we all know, it does fine around 1600-2000w continuous depending on outside temperature.
While with extra heat-sinking 4500-5000 watts claimed for BBSHD

at 88v and 55-60 amps.

juanjo   10 mW

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Re: CYC X1 Stealth (NEW)

Post by juanjo » May 07 2021 1:58am

then it will be better to climb steep and continuous slopes with the X1 PRO GEN 2 2021?

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