Malossi and S126 jetting

Hi, I’ve searched the bulletin and can’t find an answer so help…

Here’s what I currrently have:

89’ PX125E fitted with:
166 malossi kit (head and Barrel)
casings matched
SI26 carb with a 114 main jet
sito plus exhaust

all set up by taffspeed 2 years ago - runs like a dream - but sito now rusted out so en route is a nice shiny SIP performance pipe - due tomorrow - Now I sense I’ll need to upjet but not sure what too - I’ve been told 125 main but this seems like a heck of jump.