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15 % nitro ?

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this is from towerhobbies site for the sirio .30

REQUIRES: 15% nitro content fuel for break-in
Trinity Monster Horsepower fuel with 20% nitro after break-in
 
ALright also in the heat cycle break in procedure it says to open the main needle one full turn. On full turn lean or rich?
 
The sirio is amazing I have not run into ANY problems in break in, it hasn't even flooded. Also The rotostart seems to turn faster than the s 25 ( dont know if thats possible) But I miss pullstarts believe it or not.
 
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