139qmb
 

I have 2011 taotao 50cc or what 63 idk but yeah 58 63 it will go unless you get a push and it will do 66 but idk what rmp. I was see if any one know if you could put a 150cc kit
On it.

Or if one would even fit custom you know ?

I don't believe it would fit. you can look thru some of the older threads ,to get a better idea.