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HELP Carb Jetting

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Purchased a viper 150cc dirt bike. Bought a Keihin carb for it so I can actually change the jets on it. Stock one is just a throwaway you can't take a apart. Specs for he carb I bought: Air Filter Mount: 38mm

Carburetor Intake Diameter: 27mm

Fix Bolt to Intake(Hole to Hole size): 48mm    (Hole Centre To Hole Centre)

PZ27 carb.

As suspected it runs only on half choke with current jetting and even then can't use full power or it starts sputtering. I need to know what size jets I should order to replace the current ones. Live in Maine. Average day of riding is around 80 degrees outside. Much appreciated if I could get some answers. I have an idea but don't want to order the wrong ones without getting reassurance.

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