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Old 08-01-2008 | 10:41 PM
  #4000  
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grizz1
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Originally Posted by British Menace
Hi
I have a 5 port .21 GO with a standard head and I'm running 15% Nitro in her.

Does this motor come shimmed for 15 - 20% Nitro or 30% ?

Sorry if this Q has been asked a dozen times before.... just no time to go looking. Sorry.

British Menace
They come shimmed for 30% out of the box. You will be much better off changing from the 15%. Run 25% and you will notice a big improvement in all around performance. These motors love a good dose of nitro
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