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Old 03-02-2006, 06:16 PM   #16
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You used an 84 tooth spur and a 20 tooth pinion. It was not defective, it was your gearing. 87/20=4.35 84/20=4.2

You geared too tall.
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Old 03-03-2006, 07:31 AM   #17
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These motors definitely have a sweet spot for temperature, RPM, and torque. It doesnít help much that the instructions totally lack any off-road guidance, but I would suggest starting a tooth higher than a monster and then working your way up from there. I donít think itís safe to say at this point that CO27 = Monster Stock + X number of teeth.
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Old 03-03-2006, 02:38 PM   #18
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No matter which version of the motor you get, it's a good idea to run it on a motor checker or your charger around 3.0 volts for a good 8-10 minutes; this will allow the comm to harden. After that, cut it, put whatever brushes you want on it, and give it hell.
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Old 03-27-2006, 03:15 PM   #19
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I need a little help, how would the gearing compare to the PK2 pro?

I'm runing this motor in on road, but I have not tried it on off road.

Cooking the comm - I have been told to "bake" it at 400 for 10 mins. Or is it better to just run it in break in mode for 8 to 10 mins?

Yes... for on road, 767 brushes, but we do have a couple of people working with 786 brushes on the postive side, F on the negtive side, and purple springs all the way around, taking a little tention off the negtive side spring, all this for a small tight track...
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Old 03-27-2006, 03:38 PM   #20
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Gear it like you would a P2k2.
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Old 03-27-2006, 04:55 PM   #21
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A 20 in a t4 is way to tall of a gear i would run like 16 to 18. At our middle sized track we've been running between 16 and 18 on mf2's and t4s.

I do agree it took my motors 2 cuts and about 6 runs to get really good. Every cut so far they have picked up and made me want to buy more.

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