Re: my engine works but little power from throttle
Separate and tape off the metal parts of your wires. Make sure they do NOT touch each other or the frame or any metal. This will keep them from shorting out and possibly killing your ignition coil.
If it still runs, you should be fine after fixing the wires properly.
Remember these engines take some break in time to start running good so don't expect too much for the first three or four tanks of fuel.
Keep reading here for tuning tips once you are fully broken-in and ready for more!
If more is better, then too much is just enough.
If you can't afford it, build it yourself.