RD Vespa Carburettor Idle Jet (SI 20.15 - 26.26D/H/E)

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Idle Jet Variation: 155/100
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RD Vespa Carburettor Idle Jet (SI 20.15 - 26.26D/​H/​E

The choice of idle jets primarily effects the lower to mid rev range. The jets are marked with two numbers, e.g. 55/160.  Smaller the number larger the jet, and/or bigger the calculated ratio. With the adjustment of the smaller size leaner the scooter will run at moderate revs. 

Comparison No.  0989204 02 (DELLORTO)

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