legendary yamaha
IG:ne_caferacer_club
the majority of rebuild kits are either incomplete or they are not suitable for your carbs. Most dealers haven't a clue which kits are required for which model carb set so they sell them as suitable for all which is often not the case.
These carbs need comprehensive and meticulous cleaning and setting up or you will have all sorts of issues .
First of all tell us the model year of your bike and give us a picture of the air filter side of your carbs so that we can identify the carbs and advise what jets should have been fitted
There are numerous video guides on youtube which you might find helpful
My bike is 1977, and the carbs are Mikuni bs38