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Old 04-22-2003, 10:41 AM   #1
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Default Sirio .12 Break In Settings

I have the sirio .12 rear exhaust, slide carb, non turbo engine, I am just wondering what some base settings are on the carb, I sealed everything up on the carb, so I had to take out all of the needles. Can someone help out with some initial settings.
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Old 04-24-2003, 10:45 AM   #2
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Anyone???
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Old 05-18-2003, 06:37 AM   #3
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Urgent Notice!!!!
All carburetors are factory set on a flow bench. For this reason it is recommended that you count the number of turns on the low and high end needles before you use the engine. All carbs are not the same, but are set to flow the same amount of air and fuel. Up to a one half turn difference can be had on factory carburetor settings on each needle. A two micron difference in the needle taper can make the setting up to 1/2 turn different from another carb. It is also not recommended not to adjust the mid-range needle setting on your Picco, Sirio or Rossi until you are completely comfortable with carburetor adjustment.
How big is a micron? There are 25,400 microns in one inch. This dot (.) is approximately 1/64 of an inch wide and equals 615 microns. It doesn't take much to off set a needle setting.
Sirio .12/15/18 (General Carburetor Settings)
High Speed - 5.5 turns
Low Speed - 2-1/2 (Generally this should be flush with the end of the slide)
Mid Range - Flush then one turn out.

This is straight from Trinity's web site. Hope this helps.
John
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Old 05-18-2003, 10:34 AM   #4
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Cool, thanks for the help there!
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