I'm doing tons of research right now and it looks like the 110cc engine I have might be a bored and stroked version of a 90cc or 70cc? So I don't think it can go any bigger unless I go total custom with this engine.
So then the question becomes what camshaft should I put in it? And if its even possibly to get a race head for this engine. And I think I found a source for exhaust tubing
P.S. The engine manufacturer is Zonshen. The engine is a 107cc Bore/Stroke 52.4mm x 49.5mm Single-Cylinder, 2-valve, 4-stroke
for your engine imo dont worry with the bigbore kit it will cost too much and cause too many hastles...
its only really worth it if you have a bigblock alike the yx 160's
the cam...
from the retailer that you are buying from you will probably get a choice of 3 cams i would probably go for the longest duration possible (higher rpm) because you are running boost or maybe the second one to help the engine to get up to a speed that it can spool the turbo. to run a agressive cam you will need to replace your valve springs with stronger ones (HD alot of people call them) as so your valves do not endup smashing on the piston and rendering the project a good wast of money and time
or you could try boosting it and getting all that sorted and settled and then decide weather you want to upgrade the engine to something like a yx160 or a lifan 150 (same as mine) but the yx would probably be better because its a big block (limiting the cc to approx 192cc) whereas my lifan is a midblock (limiting to my stroke and bigbore to about 160cc) also take into consideration that the lifan stock has a longer stroke so its more "tourqier" and if you listen to mr Ferrari "tourque wins races hp sells cars"well i think it was mr Ferrari or someone like that
for that engine you may be able to install larger valves and do the cam depending on how much 'meat'
you have on your head between the valves and edges of the bore but remember that it increases load on all of your other components... so if you have a similar 4spd gearbox like what most other pitties run it should be allright with the extra power but the clutch will most likley be the limiting factor
and it might be a hard one to upgrade unless they are the same or similar to other models
woahh that was alot of typing i hope i was clear enough and did not go too far off topic