Can't Figure out what size motor I have on this Motovox minibike & It starts up but when I turn throttle engine doesn't rev up and wont engage clutch?

[JayMo]

By any remote chance, after you get it started, do you make sure that once it is running and up to operational temperatue, that the choke is turned off???...A choke not disengaged will do what you are experiencing...Just a thought.

I’ll make sure I check that later today to see thx