I bought my son a used crf50 for $100 (not sure what year, frame has been repainted) anyway, it's not to bad to start but the carb does not have a choke and it would start a lot easier if it had one. Don't know if it's the stock carb or not, both pilot and main jet are removable as I had to clean the carb to get it running, that's why it was so cheap and no title, what other mods can I do to it to make it perform better? Already has a aftermarket cdi, stock pipe, kid said it had an 88cc kit but I don't think it does.

also should I just modify the stock pipe or buy an aftermarket one and if so who makes a decent cheaper pipe? And if I add a pipe do I need to go to a bigger barb, my son is just learning to ride, he's 7

Post some pictures of the engine and carb area, so we can see what you have to work with. A stock OEM Honda XR/CRF50 carb has a non-removable pilot jet, just as an FYI.

I can take pics but I use my phone for everything and not sure how to post pics to hear off my phone, does anyone know how to do that

somewhere along the base of the cylinder you will find "49 cm^3" if it is a stock motor.