Sinnis blade k157fmi big bore kit

Hello all,
Pleased to have joined the new community.
I have a sinnis blade 125 with the k157fmi engine.
I am after a 150cc big bore kit. I have located one on aliexexpress which I believe is the correct one.
Will I need to down jet the standard carb for this to work?
Many thanks
Phil

I've sent you a pm response to your pm but you will need to upjet. Buy a few different sizes and do a plug chop test to confirm that the bike has the correct mixtures. Youtube is handy for videos on plug chops

Thank you ver much, much appreciated:)