hello everyone! here's a few questions

1) I'm a D license holder (without P. I'm 26 already) and would like to take a B2 license for motorbikes. Do i have to take any theory and test again? How much would it be if i take my B2 now? is it a one day process?

2) I'm recently into naked bikes and found that there's a few 250cc bikes that is DAMN INTERESTING. Any recommendation? My budget is below 10k if possible. (plus minus around there)

3) I've shortlisted a few. Any comments on the bikes below/other recommendation? Here's a few i'll list down.
a) megelli 250sr
b) YSM T2
c) Demak DZM 200
d) Keeway RKV200g
e) Nimota CK9

4) Last question. I'm quite noob la in bikes so i was just wondering what determines the tyre width size? Big tyre bikes looks cool tho!
The reasons I will be getting a bike will be more like a weekend drive or "night drive a.k.a yumcha" only. No daily use intended.

lazy to read thru all of their pages la...that's why open a topic here to gather all the sifu to have a chit chat
anyway what about dzm200? any problem should i expect if i buy it? pro/cons?

i have joined dzm 200 fb group for about a month now...
it is hard for me to believe that new model has ZERO problems...not even minor one...

been aiming for dzm 200 for about a month now, waiting for 2nd batch to come out, as i asked reliable shops in penang which only sell china bikes like demak and kee way...

their manager comment about first batch of dzm 200 is that the screw of the engine easily comes off, even change new screw still easily loosen..

but tracking fb dzm 200 group, none reported any problem of such...which makes me     

how u know?
i see u from penang/kedah as well...
where u plan to buy it?

so far i survey around penang island, only chang motorshop in pulau tikus gives best price..

but z250 is quite expensive (i personally think not worth it if buy with loan. interest damn high!) actually im just looking for a fun ride...not really looking for topspeed. So eventho a second hand bike would do actually ! just that it would be good if something looks cool heheeee.

After all the sifu commented, my choice would be DZM200, duke200, sym t2? nimota ck9?  ahhh confusing...

anyway whats the factor should i consider when changing to bigger tyres? rim?