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  1. #1
    RC Competitor
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    Aluminum motor mounts; weak point

    I’ve bent two in my 4pede..... causing cogging/noise.

    Which is something everyone should look at/examine when they can’t figure out where the “shaking” or grinding noise may mysteriously be coming from when everything else looks great and electronics are not fried.

    What’s the strongest option? Or are they all aluminum.

    I have a longer more powerful non Traxxas motor installed which is heavy and a lot of leverage on harder landings. Not even huge jumps, just an accumulation of downforce over time and many runs can bend the aluminum ever if the motor screws are tight with lock tight.

    Not a manufacture issue, just looking for something better considering it’s over powered.


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  2. #2
    RC Champion Panther6834's Avatar
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    I'll take a stab at it. If you are using a 550 can motor, as opposed to the usual 540, not excess weight, as well as excess length, is probably what's causing you to 'bend' your motor plates. It's kind of like a fulcrum, and, in your case, you have put excess weight & force on the "wrong end".


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  3. #3
    RC Turnbuckle Jr. olds97_lss's Avatar
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    I run this one:
    https://www.amazon.com/Traxxas-6890X.../dp/B002XZIGVA

    I have a 4074 2200kv 1/8th scale motor bolted to it with a 1/8th 150A esc in a slash chassis. I air this thing out all the time and no issues with the motor plate.

    I also have the king headz high cg motor/bearing mount which likely adds rigidity to it as well:
    https://www.kingheadz.com/product/tr...lemetry-mount/



    This is my last run so you can see what kind of abuse it typically goes through:
    https://www.youtube.com/c/olds97lss

  4. #4
    RC Qualifier GotNoRice's Avatar
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    Agreed, the Traxxas 6890X plate is the best. It's thicker than any other plate I've seen.



    https://traxxas.com/products/parts/6890X

  5. #5
    RC Qualifier Calebs0615's Avatar
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    That is thick.. Does it come with longer screws? Im not sure the ones that come on the truck would be long enough would they?

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  6. #6
    RC Qualifier GotNoRice's Avatar
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    Quote Originally Posted by Calebs0615 View Post
    That is thick.. Does it come with longer screws? Im not sure the ones that come on the truck would be long enough would they?
    I've always used the same screws and the screw length has not been an issue.

  7. #7
    RC Qualifier Calebs0615's Avatar
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    Okay thank you I just got a strc one and it seems to be working okay for now. I literally haven't even run a full pack on it yet. Its basically brand new.

    Sent from my LGL722DL using Tapatalk

  8. #8
    RC Competitor
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    Quote Originally Posted by GotNoRice View Post
    Agreed, the Traxxas 6890X plate is the best. It's thicker than any other plate I've seen.



    https://traxxas.com/products/parts/6890X
    But it has holes which is a huge weak point, great for cooling, not for strength


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  9. #9
    RC Champion Panther6834's Avatar
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    Quote Originally Posted by aaronjohn View Post
    But it has holes which is a huge weak point, great for cooling, not for strength


    Sent from my iPhone using Tapatalk
    That aren't "holes", just recesses...they only go approx halfway through. You are correct in thinking they assist with cooling (the recessed side goes against the motor).


    ~ More peace, love, laughter, & kindness would make the world a MUCH better place
    ~ Love, laughter & kindness makes the world better

  10. #10
    RC Qualifier GotNoRice's Avatar
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    Quote Originally Posted by aaronjohn View Post
    But it has holes which is a huge weak point, great for cooling, not for strength
    Well I use the 6890X plate in my Slash 4x4 Monster Truck with a 4074 motor and it handles big jumps. I bent the stock plate doing smaller jumps, when I was still using a smaller 3670 motor. The 6890X definitely does not bend easily.

    Here is a thickness comparison. This is me holding the stock plate (not installed) above the installed 6890X plate:

  11. #11
    RC Turnbuckle Jr. Squeegie's Avatar
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    I used the one by Hot Racing for my LCG Slash 4x4s:
    https://hot-racing.com/?partnumber=LCF1801;c=805

    They also make them for the Stampede 4x4 as well:
    https://hot-racing.com/?partnumber=SLF1801;c=603
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