Cog swappin’
One of the worst bits on the CB750 was the rear chain.
This was apparently undersized, lacking the slightest trace of lubricant (hence the shrieking noise when moving the bike around), rusty and worn out. Apart from that it was okay, but I replaced it anyway! Photo 1 shows a comparison between old and new, and as you can see I went a bit over-the-top and bought a DID VX series gold-plated X-ring chain which should last another 100 years at my annual mileage rate.
I suppose I am fairly mindful of the relationship between the old CB750 and chains as there was a bit of trouble here in the early days. Back in 1969, owners were not used to engines which could maintain a high (for the time) output and were probably not as careful about chain maintenance as they are now. Also,
