Got a used GoPed yesterday for the engine. It was very clean, like the piston and exhaust port were 95% carbon free. Serial # 801095 It has a Walbro WYJ 138 843 carb measuring .406" exit diameter (venturi). The carb manifold has a weird internal design with 'baffles' as the circular intake changes to rectanglar head intake. If I understand correctly, the stock carb is not suitable for RC use; have a Walbro 167-1 that could be used. On the manifold, can I just grind out the intake to .553" and cut out those 'baffles' or should they stay?
The stock muffler is straight pass-thru with a baffling material on outer surface. No Modification unless outlet pipe should be enlarged from .37" to something closer to new carb outlet size.

Briefly visited a GoPed forum, and there was mention of Zenoah g23 s made for different applications having different ign. timing. If this is correct, does anyone have any idea what the setting is for the G23LH version?

It appears that the head can be rotated 180 degrees, has posts both front and back for the coil.
If it were rotated, should the piston be rotated 180 as well (wear/seating of rings)

THE FIND
with tires, brake rotor, and engine recoil starter this thing would run as designed.
Xmas came early!