zennco yb125

hi guys my name is Daf. I recently bought a zennco yb125 running with T'n'T but with some minor faults. I've been over the frame with rust treatment where needed now just looking to tart the bike up some and fix the problems it has. I'll take some pictures and post them up ASAP. Also any help with sourcing parts would be much appreciated.
Parts that need fixing:
Poor engine running (not idling properly and over fueling)
Fix the cracked or broken fairings,
Correct the terrible rattle can paint job by previous owner,
new rear brake pads,
release some pressure in the front brake,
new braided brake lines,
speedo drive and cable.

Parts purchased to date:
New front light fairing,
Hand guards,
L.E.D indicators,
CG125 rectifier (supposed to be better than the standard chinese unit?)

I beleive these have the cg125 4stroke clone engines, I'd like to get an uprated CDI, Ignition Coil, Iridium plug, air filter and exhaust for it, possibly a better carb.

Any help you guys have would be much appreciated, places to purchase parts and what parts to get would be awesome. I also own a honda nsr125 foxeye and zxr400 (far easier to find parts for) however my mate was selling this bike and liking a challenge i bought it to "do it up" and restore it to its former glory.

All help welcome.