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Old 06-07-2019, 11:49 PM
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Hi there got my first r1 motor 6.5 t from rotor Ron and man is this thing smooth I running a hw xr10 pro but bought my friends r1 wurks 200 amp esc and I'm running it in my zx6.6 kyosho amd also have the program card any recommendations please message me I've only been doing this a year so could use all thr help I can get thanks

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Old 06-21-2019, 12:41 AM
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Some of you in the UK may have seen that at the last few BRCA Touring Car Nationals & Clubman meetings there have been a few disqualifications of people using R1 motors; some of these were brand new out the packet and so have been built out of spec by the factory. Statement from R1:

We would like to address the stator stack issue regarding the BRCA/EFRA V21 (not including any ROAR V21 Motors) Motors included in this issue are BRCA/EFRA 13.5 V21 PN 20006, BRCA/EFRA 17.5 V21 PN 20007 & BRCA/EFRA 21.5 V21 PN 20008. Some of the stator stacks on these motors are measuring below the 19.3mm limit set by BRCA/EFRA. We have been investigating the source of this problem for the past week and we have identified the problem, we are still in the process of identifying what batch motors are affected since we know that not all the motors are failing. Out of several R1wurks motors that BRCA/EFRA inspected, including motors inspected for the recent 1/12 EFRA event there has only been 2 motors that failed the stator stack height out of multiple R1 motors inspected. We are aware that there could be more motors that have this issue and this is the reason for this announcement. We will be sending replacement stators for the motor batch that we have identified so far and we will make sure that anyone thatís been affected by this issue will have a replacement stator as soon as possible. At the moment as we are still in the process of deploying this solution, we advise everyone that has the BRCA/EFRA V21 motors listed above to avoid using the said motors at BRCA/EFRA sanctioned events until we have the opportunity to correct this issue. We have directed our factory to expedite this process and as a precaution we will be re-inspecting the replacement stators as soon as they arrive here in California. We will be shipping replacement stators to our distributors. We apologize to everyone affected by this situation, we are working hard to resolve this problem as soon as possible.

To help everyone understand how this happened, please read below.

The BRCA/ EFRA V21 motor has experienced some stators coming loose of the can in the past, to address this the factory added an extra amount of glue to compensate. Although this solution worked to minimize or eliminate the loose issue, this in some occasions accumulated glue on the edge of some stators making some motors impossible to QC and measure properly since the glue is adding to the stack. This in effect caused the said stators above to fail inspection.

To address all our other customers, from our investigation the ROAR (USA) version V21 and JMRCA (JAPAN) line of motors are not affected by this problem. For anyone that has concerns regarding this matter, please message us through our Facebook page or email us at [email protected]

We would also like to sincerely apologize to Jimmy Maddison and Daniel Booker for their motors that failed, we would like to clear their names and we would like everyone to know that both motors that failed is 100% the mistake of R1wurks and not the drivers.

Steve Villanueva
R1wurks
R1 Brushless Motor Lab
I've just checked my motor and it seems to be ok in terms of stator length etc.
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Old 06-22-2019, 12:24 AM
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I wonder if this stator is due to the motors failing at tech ?


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Old 06-22-2019, 03:35 AM
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I'm in the market for a new ESC and the R1 Digital-3 has caught my eye. Does anyone know of any threads discussing this ESC? In particular I'm interested in the data logging capabilities and getting the graphs exported to a PC.
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Old 06-22-2019, 12:14 PM
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Originally Posted by Waztrain1234 View Post
I wonder if this stator is due to the motors failing at tech ?




The motors that failed tech recently was due to a stator length issue caused by manufacturing problem. R1 is handling the issue very professionally by sending people new rotors. As far as I know only two motors have had the issue, but I'm sure there could be more.

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Old 06-22-2019, 02:13 PM
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Originally Posted by tbrymer View Post
The motors that failed tech recently was due to a rotor length issue caused by manufacturing problem. R1 is handling the issue very professionally by sending people new rotors. As far as I know only two motors have had the issue, but I'm sure there could be more.
their statement says stators not rotors. Am I missing something?

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Old 06-22-2019, 02:31 PM
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Originally Posted by STLNLST View Post

their statement says stators not rotors. Am I missing something?

Yep, sorry, I meant stator
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Old 06-24-2019, 05:30 AM
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It's official; R1 v21 13.5 and 17.5 have now been removed from BRCA and EFRA homologation lists.

I hope R1 will offer an exchange programme once the v21-s is homologated. For now, I'm left without a motor just 1 week before the next round of the Clubman's.

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Old 06-24-2019, 06:08 AM
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Originally Posted by LzREngineering View Post
It's official; R1 v21 13.5 and 17.5 have now been removed from BRCA and EFRA homologation lists.

I hope R1 will offer an exchange programme once the v21-s is homologated. For now, I'm left with a motor just 1 week before the next round of the Clubman's.
Is there a press release or something regarding this?
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Old 06-24-2019, 08:09 AM
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Originally Posted by gigaplex View Post
Is there a press release or something regarding this?
No official release as of yet but looking at the lists, they are removed completely off the list so they might be trying to figure out a solution to it.
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Old 06-24-2019, 02:31 PM
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Looks like they are off the BRCA list till 2021...
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Old 06-24-2019, 02:35 PM
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It looks like all V21 are now removed from EFRA and BRCA lists.
Although the new stators looked like an "easy" fix, it seems that BRCA won't let R1 send any new motor for approval until 2021 !
I hope the v21.5 will be accepted and homologated by EFRA, because the sanction seems a bit harsh...
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Old 06-24-2019, 02:57 PM
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What does this mean for ROAR? Do you think it will have an effect on ROAR list?
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Old 06-24-2019, 04:05 PM
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Originally Posted by patorz31 View Post
Looks like they are off the BRCA list till 2021...
Because of when the submission deadlines fall, they won't be allowed onto the homologation lists until 2022!! Bad news for R1, let this be a warning to other manufacturers to tighten up their quality control.
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Old 06-24-2019, 04:37 PM
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Originally Posted by youngrigo View Post
What does this mean for ROAR? Do you think it will have an effect on ROAR list?
The ROAR variants have a different part number (eg 21.5 part number is 20011). We'll see what ROAR does, but past history suggests they won't take action until the motor is end of life anyway.
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