I'm not sure if I've ever chimed in on the topic relating to building the 110, but I may as well. I've built nearly every combination of parts, brands, etc from 106-110cc. I've done complete Honda trailbikes kits, dratv stroker crank, high compression piston, stock head with cam, race head, kitaco crank, flat piston, 49.5mm stroke and 54mm top for 115cc...xr70 head, chinese e22 head, etc etc etc...blah blah blah.
The best, and most impressive motor out of all of them was configured as follows. This particular motor outclassed a lifan 140 all over the place, and was a pleasure to ride in all bands of the RPM.
Base: Honda CL70 motor with 4-down transmission (avoid the 1dn 3up xl and sl transmissions at all costs IMO)
Crank: DRATV 52mm crank...it was a 6v version but doesn't matter
Head: E22 race head from greece. This head had the same combustion chamber as the stock ct70 and same valves, but used a cam with bearings...basically the same thing as the dratv ultra head but using the chinese style camshaft. Head was ported.
Intake manifold: Honda ATC125m. This is a bolt on intake and was port matched to the head and deburred throughout.
Carb: Mikuni VM20 carb and kn filter pod
The electronics were stock ct70 with advance flywheel and points.
Piston 52mm dratv high dome piston. Cylinder was a steel 85cc that I bored to 88cc but marked 72cc
Clutch was stock pack but using 3 plates from trailbikes and dratv hd springs
HV oil pump from takegawa.
I also ran an oil cooler on it at the time, it was a home made style I created from a temp-a-cure transmission cooler.
For some reason, this motor was just absolutely incredible. It was perfectly dialed in. It would run 55 all day except up the most steepest hills in 4th gear. Topped out around 65mph
To this day, I have not replicated the performance of this motor for its size. Not with CDIs, larger carbs, more agressive cams, or better quality materials.