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Here's the final deal. The 4.2 king is a bum motor (just mine, I cant speak to all 4.2 kings). I turned the impeller/shaft manually and can feel the motor rubbing inside the casing. I think that it may be pitched slightly, so that any needed clearance inside the casing is compromised during operation.
The 4.2 king pro is fine. It definetly is fasted than the stock motor (no big surpirse there), but hard to tell how much.
So here is another beef I have with all the faster motors, on hardwood floors and even linoleum, all the car does is spin. So I say the king pro is faster because I am guessing the faster tire rotation is causing the spin outs.
Any suggestions on having bits (or Zips) work on lower friction surfaces (like hardwood) would be appreciated. I am guessing that maybe a small washer (just for weight) taped inside the front section of the car may help.
Anyone have a similar problem and found a solution??
Anyway, one other hope...if these toy east motors fit in ZipZaps like Bad Company has said, then I am guessing that using proportional acceleration may help or eliminate the spin outs since you can start slow, get them going, and then put the petal to the metal once the car has forward momentum.
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