UPDATE (04-19/2014):
Engine swap work on Metreaus is underway. I bought a used 150cc long case engine for $200, but it needed a replacement head. A friend of mine had one in good condition and let me buy it for $18 (including appropriate gaskets.
Upon disassembly of the engine (for inspection and head installation), I saw just how well spent that $200 was.
The piston/cylinder was nice and fresh, as the rings aren't even seated yet; you can still squeeze 'em together! And not to mention that performance cooling fan...so far so good. Checked the CVT components, gears, and filled up all oils (gear, engine) prior to install.
The 150cc engine is succesfully mounted to the frame but because of the longer wheel shaft, I had to order a swingarm bracket and spacers (awaiting delivery). I also ordered a new airbox and a flywheel puller (awaiting delivery) to transplant the Kymco stator over to the new engine as the stator wiring on a standard gy6 does not match that of the Kymco's. I'm going to order a new exhaust/muffler to replace the old, worn one as well.
In the meantime, I got another ChiCom scooter (nicknamed Buster) on a mechanic's special, which I'm using to get to/from work and what not while work to Metreaus is done. I'm gonna keep Buster even after Metreaus is brought back to glory so that I won't go through the downtime again. I lost some good-paying computer repair sidejobs in the past couple of weeks due to not having a running scooter, so this is a lesson learned (never put your eggs in one basket!).
Anywho, here's a looksie at Buster. Enjoy!