I bought a 1979 cm400 about a year ago and it recently started making a clacking noise in the lower engine. Checked the valves and cam chain and they seemed fine. Was going to adjust the balancer chain and found the punch mark on the balancer shaft was at the bottom, ie about 6 0'clock instead of around 12. The bike has 35,000 miles, so I assumed the chain was badly stretched and that someone had moved the plate and tried to keep adjusting past the 9/3 o'clock position, but upon inspection, think it was just put in rotated 180 degrees. I can turn the shaft clockwise and it seems to tighten the chain. Since the ecentric shaft only moves the balancer a small amount, can I just leave it like that and adjust it manually. Obviously, the spring is useless in this configuration. I'm new to the forum and will post something in the introduction section too.