question on cr50

i have a cr50 that we just dropped a 110cc motor in. it has a big gun pipe. my question is what is the factory setting on the carb the air/fuel mixture.. and with this ehaust does it need jetted? needle changed? doesnt seem to be runnin right.. thanks normally not workin on these little guys

Some pics of the carb you have on it now would be a help, so we can see what you have to work with.

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