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hpi motors

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Military Veteran!
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ok, so what exactly is the difference between the F4.6 and the K4.6? and how do ya tell what one ya got?
not havin such good luck with the SH motor. it seems to have good pinch, but it dont like to run for very long. so i will replace it lol I'm not a patient person!
 
The F has a silver block and the K has a black block.

The F is a little bit stronger and faster engine than the K.

The F is actually the ofna force .28 and the k is the axial .28.
 
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