If you are careful and don't allow the takeup man to screwup, you don't need any marks. The new chain just follows the old one.

But, you really need three people.

One to turn the crank.

One to feed the new chain and keep it on the camshaft.

One to keep tension on the old chain as it comes off the crankshaft.


I have not done any chains personally. And, I'm not attempting it without two competant helpers. The risk of FUBAR is too great.