Shuddering when taking off
 

I've had this frustrating problem with my 95 Civic (SOHC 1.6L PGM-FI
non-vtec D16 variant, manual). It sometimes shakes/shudders when taking
off from a full stop. I could prevent the shuddering by stepping on the
gas more. I've replaced plugs, wires, rotor, PCV, timing belt, fuel
filter (all Honda parts), but sometimes the problem returns.

When the timing belt was being replaced, I noticed that the rubber on
the driver-side engine mount was cracked, about half-way through. Two
different mechanics have told me that since the mount is relatively
new, the crack couldn't cause the shaking, and that if it did, it would
also shake at idle, which it doesn't. Is this true?

Please enlighten me, if the cracked mount caused the shaking, wouldn't
it shake all the time?

Thanks!