problem with my 660 kancil

just to help out anybody who have problem with kancil jerking....i already change

1) fuel filter
2) contact point
3) air filter
4) fuel pump..
 all this cost me around RM 240.00. the problem still exist.last tuesday the problem come to the critical level where i have experienced jerking all the way from putrajaya to subang. i have to use highway skve and elite instead normal road LDP.

at the beginning, i just want to go normal bengkel repair kereta. after shooping around where i can see their condition and messy place, i decided to make u turn to perodua center. meet this guy who name dzaba,which i think he has some experience how to overcome this problem. he suggested me to change carburator and electronic distribution. after some negotiation, he persuade me to change electronic distribution. all this cost me around RM 220.00, make some bargain and i got RM 180.00. is it fair price?...
Moral of story... survey the price of item first and always take back the original part for keep or further action.

diagram showing how electronic distribution work.this cost me heavy price????