alamak, even if I thread the lock through the small triangle on the rear part (refer picture)?

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I am also thinking a long metal chain and padlocks to secure all the parts. must try first, but I do worry the bike goes missing 

no, even with bags cannot at peak hours, at least that's the case with Kelana Jaya line, which I'm using mostly. I do understand why though coz it's really pack, even today I board from the 2nd station from the end, already squashed like sardine. RapidKL KJ line does not make compulsory for bag but peak hours strictly cannot

KTM Commuter which I need to change into need to be put in bag, but still also cannot in peak hours. although for Komuter, maybe can sneak in,as most of the quiet stations doesn't have guards.

My dad said, the only solution is to cycle to office, which I plan to do too, but need to practise, stamina wise and route wise. 
cannot  and their peak hours is 6am-9am, 4pm-8pm on weekdays! which totally beat the purpose of bike+train commuting to work right? I wish for the days Malaysia have train for bikes like in Amsterdam, haha even the big bike can enter train and I read that the bikes occupied more than people in the trains.

anyway, for me, what I can try is to cycle from my home to the nearest KTM Sentul about 8km away. As Sentul station is not crowded at all in the morning, an isolated station, also I never see the guard there, so maybe can sneak in the bike at peak hour he he he. then it's only 1 station to my office. My usual trip without bike is via KJ line, then change to Komuter in KLSentral, but maybe I can try this with the bike

here's a link to a bloggers experience who try travel via the usual intercity komuter: http://ahpekbiker.blogspot.com/2014/07/bri...-malaysian.html

Hey guys, so today my first day ride my bike to office + komuter. I decided to ditch Putra LRT (KJ Line) as it is not feasible at all given the human volume that ride lrt during office hour. I have tried bring bike once during non office hour (10 am) in KJ Line LRT from Gombak to Dang Wangi station, no bag, passed.

For today, cycle to Komuter Sentul from Gombak, in about 30 minutes. I was late from home about 7:45 am so traffic is there. Really ride defensively as office people are fierce when they drive to office,  , cars don't care if you are there really at the edge of the road and still squeeze you. I thought motorbikes are my allies but they are no less competitive in the race of who gonna reach office first    A motorbike still squeeze in between me and a car and give me the 'look'. LOL, these people love office too much  So, what I'm saying is we really really ride defensively in morning traffic.

Nevertheless, made it safely to Komuter Sentul in 30 minutes, which is 10 minutes earlier than the first time I ride it in trial ride in the evening. In komuter station, I fold it trolley style with the handle not folded so I can push it around like trolley. I look at the guard if he gonna stop me, I bring my bike bag too, just in case. I asked the guard, can I go in like this, and he give me an ok nod, so I push my bike like trolley in to the lift and to platforms. Arrived the other station also, I push it like trolley into the lift. This reminds me sometimes the lifts in komuter will not work, so I make a mental note that when those times happen it will be a bit trouble to carry it up and down the stairs. Then I continue my cycle to my office about 5 minutes.

My office is at level 3 with no lift, so I fold it and bring it up the stairs. The guards said I can leave it under the stairs, but I said i don't have lock so scared it will be gone. They said it's ok, there is CCTV, but I don't wanna take chances hehehe 

and regarding shower, for today I don't feel it's necessary as I sweat only like when I walk to office. I do bring toiletries just in case I needed one.

Anyway, so I arrived safely in about 50 minutes including komuter waiting time. Gombak to Jalan Tun Ismail. I think for now I'll do this when I don't have to go elsewhere after office. Overall, it's nice to cycle to office than standing in lrt for one hour to arrive my office, only to continue another 10 minutes walk. Cycling is definitely better.

Here are pictures how I fold it like trolley in komuter. And in office the bike fits behind my chair at my desk.