my 96 dyna conv has 35,000 miles and has started to shake alot at idle, and even a high speed. could the front motor mount be damaged or worn out and letting this happen. i suspect this to be the problem because it seems to be loose there at idle. all of the bolts that mount it to the frame and to the motor are tight, so that aint it. any thoughts on this, or any other cause would be great. thanks