chamber n racing block? how much does it cost?

wahh..that was not cheap eh.. haha.. illegal?
not thinking to heavily mod la my bike, now just wanna repair my jammed disc brake, clean inside the exhaust,engines.. change sproket cos loose ade. change the engine oil, the accelration cable, what else can i do or add to improve my bike performance? thinking of changing my bike rear tyre also cos center part/stripe ade flat,worn out..

I still recalled that in my early years playing with bikes (circa or 1995-1997) we always heard of "korek blok" & "jetting karburator" from those motor shop tuners.

I learned how to ride a bike when i was just 10 yrs old from my next door's neighbour. Eventually made me fell in love with bikes then cars till now!!!

last 2 days, my bike suddenly sound so strange, the exhaust connect to engine almost come apart, both screw gone... go repair, change the gasket n re-screw it...now feels better. only rm3 to settle!
now i need to find someone to fix my disc brake, jammed d... that shop bz til cant help me! damn!