Hey everyone, I already posted in suspension/brakes but I am pretty clueless so I wanted to put something here just in case. I ride a '97 GP GTP and basically, whenever i accelerate really hard, there is a rhythmic thudding or bumping/clunk. Its about 4 per second as far as I can tell (hard to focus on it when trying to stay in control).

I can feel it in the pedal, in general through the car faintly, and faintly in the wheel also. My friend has a theory that its a bad engine mount somewhere, but he admits he isn't positive. Trying to get some theories on it before I take it to my mech, because they always try to convince me something is going to grenade and I need to replace everything.

Any ideas or similar experiences welcome so i can tip off the mech and save buckets of cash, thanks.

Matt