Search Google :
http://www.malaysiaairlines.com/it/e...d-baggage.html
Excess charge :
The charge is 1.5% of the highest normal direct one-way Economy Class (in local currency) for each kilogram in excess of the free allowance
So a normal full fare economy class fare between SIN and BLR is around $1000 one way. 1.5% of that is ...
Try to limit up to 5kg extra. They will usually let it go when you're about 5kg above your allowance. But any more and they will charge you...
As each departure city is different, best you call them yourself
http://www.malaysiaairlines.com/it/en/contact.html