EF2 runs a twin carb, 1500cc engine, whereas EF9 as u know runs on 1600cc PGM-FI engine. logically the 1.6 engine is heavier compared to the 1.5cc engine. and on top of that, the EF9 comes with all-round disc brake, which will add to the weight of the car..
wahyu,
ask daymen. he the one who saw the fire from your ekzos hahah.