two K1300S bikes, S1000R & Vespa 150 Primavera clown paint job
Today I dug out my old cam chain from my 2009 K13S. I laid it up along a new chain, setting up one leg of the loop against the chain and one leg. Careful alignment with straight edge and on a smooth steel plate, both at the same temperature. Comparing 28 links along the two legs next to each other I found the old chain was 1.4mm longer measuring at link pins. So this makes the old chain over all, total length of the loop a little over 2.8mm longer than a new chain. I can see this will make some difference in timing. The old chain has 75,000 miles on it. I have these new parts on hand as I'm going to do a valve clearance check and install a new chain at 130,000 miles on my 09 K bike. Might be a little early but I'm having some idle problems and want to get everything to base line. It wants to idle at about 1050 rpm and hunts a bit there. I can also hear and feel what seems to be chain snatch while idling. I did not think there was much stretch when I removed this chain a few years back but have now changed my mind.