Sip performer,jet size?

HAVVE FITTED SIP PIPE (PERFORMANCE )WHAT SIZE JET SHOULD I USE?FOR BEST PERFORMANCE ON STANDARD CYLYNDER AS I CAN`T AFFORD KIT YET

24mm carb: SI 125 - 130
28-30mm Carb: PHB 135-140

i would try three differnet sizes, start with the largest one.

rgds, alex

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