Yeah there's not much you can do with a Lifan 125.
The bottom end of the Lifan 125's isn't that strong, cases and gearbox's etc, standard 125's break the gear's
And you still have the only start in neutral set up too.
I can't see any benefit's of doing up a Lifan 125.
Unless you get something with a GPX125 / Z125Ho, and play around with it fitting a TB 57mm piston and a TB 57mm bore to it making it a 138cc for an extra $200 plus postage, plus all the machine work and labour etc
You could spend a heap more on a better head too.
The price difference between the 2x bike's, DHZ D Pro 125 and the D Pro 160 is only $250 more for the Z160Ho
I have seen the engine you are trying to sell Chase.
How many horsepower did it make ?
And Terry did the machining on the cylinder didn't he?
How much extra was all that worth?