does it have a 4 bolt back plate or a 2 bolt backplate? the 4 bolt backplate engines turn out pretty light and easy to convert.

the problem with the 24cc engines especially the california versions is the exhaust timing, they are in the 110* range where it should be in the 150* range. port it a bit and put an appropriate carb with 2 needles and it'll be a half decent engine, if 4 bolt backplate and the older style muffler that is just held together with the springs instead of crimped it will turn out at 3 pounds with everything but prop on stock ignition, look for my "small conversion" thread lower on the page for how I build them.