vespa polini box exhaust jetting

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boxofbits
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Sun Dec 20, 2020 10:40 pm

Hi is anyone running one of these polini box exhaust on a std 200 moter I've got one just fitted on the tx 200 with a 122 but I think i just soft seized round the ring road slightly going up a steep incline full throttle. . Can't see much about jetting on the web and instructiond which came with it are for a different exhaust!! Scooter centres website says just 2 or 3 sizes up from a sip road 2 so i reckon I may need to be in the 125 area.

gaz_powell
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Wed Dec 23, 2020 12:20 pm

You've probably answered your own question No experience of the polini box but Ive read it is greedy... Go 125.
Ive just gone from a SIP R2 to 3 and went up from 122 to 125 on a moderately tuned P2. But not used it in anger yet. Early run out and it seemed happy on the 125

boxofbits
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Wed Dec 23, 2020 12:38 pm

Thanks will see what happens

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