650/750 primary chain

I have measured five 750 four primary chains in a search for a good one to install in my GPz750, and every one of them was at or beyond the specified service limits.

There are two primary failure modes with a link-chain drive. The first is a progressive failure which results from an apparent elongation of the chain due to wear in the link-pin joint. Failure occurs when the apparent chain elongation has reached the point that the chain begins to skip teeth. Catastrophic failure is not far behind that event.

Important Rebuilding Notes
Chain Elongation: Even though Morse Hy-Vo Products are built to last, when the rebuilder has
the unit down, the sprockets and chain should be checked thoroughly.
Remember that it is very difficult for the aftermarket customer to measure chain elongation. One
reason for this is shaft movement when the unit is apart. In certain cases, when the shafts are
fixed with the cover off, an experienced field estimate may be acceptable.
Morse has special equipment to measure elongation parameters. In addition, each application
could be different depending upon the application parameters.
The accuracy rate or error rate is 50% without using the right equipment to measure elongation
of a chain. Every application has its own variations and the manufacturer’s recommended
specifications for chain tolerances should be referenced.
If the chain has been in service for over 60,000 miles,
if the unit is torn down, or if the unit shows
signs of problems, neglect, or abuse – replace the chain.