My brother and I (mostly him) just finished a complete rebuild of a 1970 k0. It started on the second kick but sounds like the new timing chain is rattling. We shut it off tried stretching the spring and still have the same noise. Looking for the correct new tentioning spring and cover but having a hard time locating. Ebay has a bunch of used ones which not interested. DRatv and partzilla are out. Bike is for my wife so really want it right. Thank you.