my 205 has been running pretty rough for the last couple of days and i traced the problem.
the left hand return hose to the expansion bottle was leaking and dripping water onto the dizzy cap along with some leads not pushed home properly.
it was arching between no 1 and number 3. although only now and then. this was also causing missing ,rough idling and loss of power as you would imagine.
after changhing hose and checking the leads it now runs well again.
the power is back and its not slugish,you dont know what youve got till its gone sometimes.-BAZZ