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T-REX 250 › Trex 250 and Scorpion Motor
02-22-2013 04:07 PM  5 years agoPost 1
wichitafc98

rrNovice

Wichita,KS,USA

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I purchase a used Trex 250, the pinion was stripped but I am not sure what size it was.

the following is the motor I am using.
Scorpion HK-220k It has a 3600 KV motor.

any suggestion on what I should get and where would get it from.

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02-22-2013 04:18 PM  5 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

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Stock motor is 3400KV with a 16T pinion!

Bill Whittaker

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02-23-2013 01:40 AM  5 years agoPost 3
Waco

rrApprentice

Bernalillo, New Mexico USA

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This thread gives you the math for matching headspeed to the appropriate pinion size. https://rc.runryder.com/t688683p1/

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02-23-2013 01:43 PM  5 years agoPost 4
wichitafc98

rrNovice

Wichita,KS,USA

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Thanks that was very helpful

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