use uma cam also can or tlc hispeed.

Y125Z for the rims have 2 types, namely the Y125Z and Y125ZR(newer). The difference will be the rear rim where the hub thickness and positioning is different.

The full chop Enkei that u normally find in shops r Y125Z spec. While the new LC5S follows the Y125ZR spec

So u will need to change/mod the bush to get the Enkei rim centered and fit into LC5S. Its not PnP in this case.

Camshaft and cylinder head is good.
loss of low end torque or some gaps in powerband can have these possibilities:
1. wrong carburetor size
2. wrong jet setting
3. wrong exhaust primary size
4. wrong exhaust secondary length
5. bad ignition timing due to CDI tuning

Check all these.

1. Tzm able to support till 65mm no worries
2. no idea...refer to plug chart
3. This might wrong d...usually use 30mm/32mm manifold if u change block bigger than 62mm
4. this 1 should be ok.
5. No idea.

usually for me get the exhaust 1st cost cheaper...if kenot then go for cdi...

1. 30mm should be enough
2. Supposed to be dark brown. Light brown still dangerous. Up your mainjet to 190.
3. 28mm or 32mm should be good.
4. CJ Ipoh cutting standard already a good exhaust. If you modded standard exhaust at  takim, sometimes the result will be good and sometimes bad. 28mm manifold right?
5. Use PnP CDI such as BRT PowerMax if you want to save your time. BRT i-max 24step can adjust rpm and btdc/degree with a more powerful spark then BRT  PowerMax. Rpm is easy to tune while the btdc/degree is hard to fine tune.

My 10 cent opinion. 

sorry for noob question...

CJ Ipoh bunyi kuat tak.. 

sorry i lost track of your bore and stroke dimension. I am assuming you are using 62mm piston with std stroke.

1. 30mm is slightly oversized. I'm using 28mm to get real good low-end. 33mm is very oversized, aiming for 10k above power.
2. jetting on my 28mm carb for 10krpm = 40PJ, 145MJ. check plug color for low-end pull only, since your low-end is lagging.
3. 26mm inlet is about right.
4. secondary looks good. check if the tail pipe is oversized (more than 1.4")
5 . Get UMA racing CDI. If you are in Penang, I have a fully custom controller that can tune by 200rpm range. This device gives me loads of low end without sacrificing mid and top.

if you are on different engine size, let's talk again

nice speed ..hehe..65mm is it ceramic kit? i heard alot if ceramic...not long lasting..cannot use as daily bike... with current 60mm spec manage to get 123kmh...i think there is alot 60mm spec can reach higher speed....

I see. stroke increase will lower down the rpm.

Perhaps u can try these:
- Uma racing camshaft --> good midrange torque.
- 32mm carburetor
- 32mm primary pipe size (inlet around 29mm)
- 1.5" muffler opening
- UMA racing CDI, use map3 +1. If buy UMA custom tune, will have balanced torque curve from low to high.
* note *
not recommending R3 camshaft because the design it is meant for 160cc (per cylinder).
you are now @ 200+cc, the total flow is much more than 160cc. R3 camshaft will cripple your power & torque.