From what I heard. twice already, a Nissan Vannette stopped and a few guys with machete came down and robbed them of their bikes and handphones. Somebody is tipping them on the value of the roadbikes!

go to any machine foundry,and they will put some metal type of insulator and make a new thread for you.cost around 10-20 bucks only.crank arm only are hard to find without chainring

unlessss....
u need an upgrade to hollowtech crank,than u can get new crank.for me 20" wheel using 53/39 already enough.but the smoothness of hollowtech crank you cannot get compare to squre taper type of crank (unless u are using dura squaretaper bb)

p/s: do pm me if u wanted to letgo that crank.want to put on my 16" trinx!

Just take out the crank and then head to Central Nuts and Bolts in Jalan San Peng or there are two more Nut and Bolts store in Jalan Balakong. They can measure it and suggest the appropriate size. They have this kind of insert  which is larger than the existing tread size. You need to drill the crank to the size and then tap treads to the size of the insert. Then you screw it in the new treads and you just screw your pedals into the new insert. Yes, it is call the helicoil. Buying the tappers and such might be a bit expensive,

https://www.youtube.com/watch?v=anjDQJtWFc8

Easier still is just sending it to a foundry but , you know lah, foundry fellas don'f really look at this kucik-kucik jobs. Better if you know a foundry worker. It's actually very simple. Alternatively,

You can just buy old cranks from BBS. You don't need the chainrings actually , just the cranks. So, an old one with different size doesn't matter as you already have both the chainrings and locking bolts. Make sure you get BCD 130 cranks, that's your size and it has 5 locking bolts and not 4 as opposed to mountain bikes which has 4. Lagi senang just go get a Shimano hollowtech crank, only RM250 from Kimbell Jaya with BB. 

There's only 110 BCD and 130 BCD for road bike cranks. No confusion there.  Usually it is the 130 BCD as the 110 BCD is for the compact cranks, usually housing 50/34T chainrings. BCD means Bolt Center Diameter. That means if you connect all the 5 bolts in a circle, the diameter is 130mm.

Why couldn't you bring one back? 

Why are the forks installed the wrong way round???

saddle change is not my priority for now.

i need to buy the lighting for night ride first. i think i will ride at night more than during the day time.

Daiso even cheaper, rm5.3

kambing to msia.... 
look at the price in japang.....