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Guess what's wrong with this JK Hawk 7


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#1 NJ Racer

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Posted 28 November 2023 - 03:06 PM

I just opened the blister pac.

IMG_0663.jpeg


"Ya gotta be in it to win it"

Ray Carlisi




#2 NJ Racer

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Posted 28 November 2023 - 03:27 PM

Look more closely at my photo.


"Ya gotta be in it to win it"

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#3 Eddie Fleming

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Posted 28 November 2023 - 03:38 PM

The red dot is on the wrong side I think. 


Eddie Fleming

#4 Jay Guard

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Posted 28 November 2023 - 03:45 PM

The endbell tabs don't look very well crimped to me.


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Way too serious Retro racer


#5 MG Brown

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Posted 28 November 2023 - 03:59 PM

Some out there would say just the fact that it is a JK Hawk 7 is "wrong" enough.


That's thirty minutes away. I'll be there in ten.
 

 


#6 NJ Racer

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Posted 28 November 2023 - 05:13 PM

Eddie Fleming... correct!


"Ya gotta be in it to win it"

Ray Carlisi

#7 Eddie Fleming

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Posted 28 November 2023 - 05:59 PM

So what do I win???
Eddie Fleming

#8 Rob Voska

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Posted 28 November 2023 - 07:02 PM

Does it run the correct rotation when hooked up to the red dot?  



#9 NJ Racer

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Posted 28 November 2023 - 07:12 PM

Secondly after an initial  connection to the power supply when cycling up to 7V it convincingly hit the "Wall". Not neccesary for me, or anyone else to go down that road again. I did purchase two Hawk 7's and the other one is configured correctly, and operational on the power supply. I purchased the 2 motors to run in a race at a distant new raceway "Race Ya" where the motor is a requrement. I never previously owned or raced a Hawk 7. 

 

Eddie I haven't considered a prize yet  :laugh2:  


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Ray Carlisi

#10 NJ Racer

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Posted 28 November 2023 - 07:15 PM

Rob 

 

It does run as it should clockwise when I connected the red lead of the power supply to the red dot clip


"Ya gotta be in it to win it"

Ray Carlisi

#11 Rob Voska

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Posted 28 November 2023 - 08:24 PM

Maybe it was assembled properly but laser etched wrong.  Flip it over & run it.  Eddie don't get a prize I do. :laugh2:



#12 Bill Seitz

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Posted 28 November 2023 - 08:28 PM

The magnets have been installed reverse of normal for the crimped motors. For some reason, the "FK" motors with removable endbells use this magnet orientation, reverse of normal for a C or D can and the crimped endbell motors.

 

In the motors I've examined that hit a "wall", they do so because they begin arcing badly. I've had this occur with other brand motors, including most recently 2 ProSlot FK drag racing motors. Usually a thorough cleaning resolves the problem, or replacing brushes in endbell motors, and a good break-in that fully seats the brushes to the comm contour always helps. I always perform dry break-in without any chemicals that might contaminate brushes. I have enough problems with oil-fouling brushes. Brushless motors do offer relief from the sundry problems that can occur with brushes.

 

I've only purchased a couple new Hawk 7's, since this isn't the type motor I typically use. Although they performed satisfactorily, I much prefer motors with removable endbells. I have acquired a small number of Hawk 7's from racers who claimed they were bad, and most of these exhibited awful arcing which was corrected by a solvent soak. They now run fine and I have what will likely be a several year supply at the rate I use them.



#13 Rob Voska

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Posted 30 November 2023 - 05:46 AM

What / how do you clean them?  



#14 Danny Zona

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Posted 30 November 2023 - 09:45 AM

I'm experiencing 2-speed shifter motor flashbacks seeing this post.

I'll probably have a nightmare tonight.

😉
  • Noose, Dan Ebert and Eddie Fleming like this
Test, test, test and go test some more.
You're never fast enough!!! 💯

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