I own a ybr 125 with just over 4000 on the clock

Don't have a clue about engines so would be grateful for any advice

Some 1 tried to steal my bike and a cowboy fixed the cdi unit and ignition set

Now when I open up above 50 it splutters,jerks and hardly touches 60

Some 1 said it might be the carb?

Any input would be great

Also sorry for not posting an intro in the new members section

I'm posting on for the other half who will do that herself

Didn't want 2 piss any1 off

Cheers