Tamiya Motor Help Please

[Only4Fun]

Hi. I've just bought a pre-owned TA-02 Toyota Prerunner. I am trying to identify the motor.

It has no labels on it and "Yokomo Japan" on the black plastic at the end.

The sales listing said "stock motor" and Tamiya Base list it as a 27T.

But this thing goes like the clappers. It has a 16T pinion on it.

I am no expert  but I have six other Tamiya's with stock 27T Mabuchi motors and this doesn't look like them and is way faster.

Any help would be very welcome .  Thanks 

[WillyChang]

That is not a mabuchi. Yokomo made a lot of the Japanese motors sold both under their name and other RC brand names. Label might've fallen off or it could've been a racing handout motor.

Hard to say what exactly is inside but can is tabbed sealed (no screws, fixed timing) and it's got bushings not ballbearings so it's definitely a "stock" type motor... many stock motors were 27t single but 20t stocks sometimes run too.

 

[Only4Fun]

8 hours ago, WillyChang said:

That is not a mabuchi. Yokomo made a lot of the Japanese motors sold both under their name and other RC brand names. Label might've fallen off or it could've been a racing handout motor.

Hard to say what exactly is inside but can is tabbed sealed (no screws, fixed timing) and it's got bushings not ballbearings so it's definitely a "stock" type motor... many stock motors were 27t single but 20t stocks sometimes run too.

 

Thanks very much for the info. It's a bit frustrating not knowing exactly what turn it is, but it runs really well and I guess that's the most important thing  

[WillyChang]

A word of caution...

Open endbell ca vs 540 Mabuchi can, you can service the brushes/springs but they usually also have better magnets than a commodity mabuchi. So even if both motors have the same 27t armature inside, the better magnets will run better. We used to openup Mabuchi (with a Can Opener, of course! ) and yank out the armature to put into any old modified motor can whose original armature was past used-by; modified motor can also allowed "timing advance".

Racing "stock" motors might be 27t but they might also have very Advanced timing... up to 36-39deg i've heard, that's crazy high... so they make good power but make even more HEAT.

I see you've got yours bolted into a TA01/2 gearbox... be mindful that heat will melt the plastics... get an alloy motor mount ASAP

 

Brushed motors need maintenance - the commutator should be flushed out with contactcleaner. Brushes & inside brushhoods need to be cleaned regularly; renew brushes when too worn (about 1/3-1/2 length). Lube both bushings with light oil.

[Juggular]

A motor with advanced timing runs faster going forward than in reverse.  (I don't mean the ESC setting, the motor itself)  However, advanced timed motors often allow you to take the motor apart.  Since it's tabbed, it could be a mildly hot motor, something similar to 25T Tamiya GT tuned.