i bought my motorbike second hand in december 2008.
Until now still ok. 

Lol...just now i heard that the girl i like was kena dengkil...I now very moodless and can't do anythings....Even sms to she....I think she was sleep ... And i hope can take care of she....T.T

lema leh.. keat

rempit ice cream seller, can deliver faster to your door   

most geng i've seen, was a pakcik selling ice cream around Kemaman while riding his FZ and super loud horn

@mls_gamer: Your carb need service. Plug can last for 10-30 thousand km. Changing that often is  not fixing a problem imho.

If you really want some answer:
1. Carb setting not cun.
2. Piston and the block not ngam. When piston/block warm up already, it changes shape. This is a usually a good thing but maybe in your case it caused air leak.
3. Somewhere engine has air leak. This one quite hard to diagnose and fix. I once had an air leak caused by crankshaft makan, can you believe it?

Do this, imho, send the bike to service carb and check all the rubber hose related to the carb. Change the worn and leaking rubber parts. Set the idling and pilot after the bike warmed up. And tell us your observation when starting the bike cold in the morning, and when u restart it when the engine is warm. This should not cost you a lot around RM15 for carb cleaning.

In my case, service carb and resetting pilot gives my bike good mileage. I had just done 200km on a full tank of RM9.60 on my RGV, using Shell... I noticed Shell better than BHP now, so I'm back to using Shell. :S