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Old 08-31-2014, 05:18 PM   #1
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Default Novarossi P5XS

Been away for a while... and have a rookie question cuz I cant remember... what is the purpose of the restrictor in the carb and is it required for good performance? Is there reason to purchase other sizes beyond the 8mm?

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Old 08-31-2014, 06:06 PM   #2
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Its a tuning option, smaller inserts restict airflow more, less air needs less fuel so the engine can be leaned slightly saving fuel, power band can be changed slightly as well, going to a smaller insert can restrict top end a little & produce slightly more low end.
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Old 09-01-2014, 12:15 PM   #3
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Thanks for the answer... I appreciate it
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