okay, this is a new one for me... when i start off from a standstill, the engine would shake and stutter very gently...problem quickly disappears when i reach 2500rpm... it is usually very subtle, and hardly noticeable unless i peel off agressively, can't seem to figure out source of problem...
any help would be much appreciated!

Don't really understand what you mean.
does it vibrate when you idle or at higher rpms when you accelerate?