Any one able to kick through the compression stroke with-out using their de-compressor lever? And if so can this really impede performance? Mine has a recent rebuild but the head was just cleaned and left alone. ( valves untouched )I can push down through the compression stroke when cold with effort over a few seconds but much less when hot. My ring end gap may be on the large size and I do have a half thou of ovality in the cylinder ( .0005" ) But the bike still rips!!