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Old 05-16-2006, 07:32 PM   #16
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think i shd buy the yokomo brush to see how they work out. ok, sorry for being so xxx. the comm tat u guys talk about, do u mean the copper bushing at both ends of the motor (where the shaft of the motor are inserted into)? i have removed them and clean them, it seems ok. just that the top comm has a slight wear due to the washer that is placed underneath it.
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Old 05-16-2006, 08:41 PM   #17
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See attached pic. the copper part in the pic by the arrow is the "Comm" that they are talking about. Even though the brushes weren't replaced for a while, this area needs to be cleaned or if you have the resources, cut on a mini lathe. The hobbyshop should be able to point you in the right direction with what motor maintenance tools are available to use.

Good luck, and if the comm is smaller than .270", it shouldn't be cut with a lathe, just clean it with a comm stick and continue running it until it falls apart.

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Old 05-16-2006, 09:32 PM   #18
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ok thanks
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Old 05-17-2006, 06:20 AM   #19
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Here is the photo of my Armature, trying to capture the Comm, but my lousy camera phone can't capture good close up. BTW i have noticed something different, today when i opened up the motor again, i noticed that there are certain cut or dent on the armature body (where the Tamiya words are spray onto), can anyone tell me if its like that? coz i remember NOT seeing them last time, can it be that i didn't reassemble it back properly which cause damage to the armature body?





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Old 05-17-2006, 06:30 AM   #20
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well the comm definatly needs a cut, the cuts in the armature are so that it is ballanced so it runs true and does not shake apart.
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Old 05-17-2006, 08:57 AM   #21
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My eyes, its so blurry!

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Old 05-17-2006, 08:18 PM   #22
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sorry guys, my camera run out of battery, so i use my camera phone
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Old 05-20-2006, 05:40 AM   #23
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just upgraded my cars with bearings, and new Yokomo motor brush, it runs really smoother and quieter. This time also really tightened the rear diff. it drifts really well, much more longer drifts, so really advisable to upgrade. But one thing i found is that the motor seems to have lost its power, no longer that fast anymore. i wonder wat could be the problem. or does it take some time for the brush to get used to it? btw, i just run a pack today. got to try out tomorrow.

just one curious question. wat type of motor (other than brushless) can outrun nitro? coz tomolow m meeting some nitro frenz for a fun play. well, just now running ABS on road, i found that its really slow, if i were to fit rubber or foam tire, would there be much difference?
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Old 05-21-2006, 12:06 AM   #24
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there would be alot more improvement because with proper tyres yuo actually get traction then with pooey abs. your stock motor won't be able to oturun a nitro but a 7x1 probably will
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