Vincent J that photo reminds me of a local friend and his 74 Z900! He rode his around for YEARS until one day he was having 1st gear hook-up issues, would feel as though it was jumping in and out of first. Then he thought it was the clutch slipping. I ended-up dropping the oil pan for him to have a look-see. Exactly like the item you show in photo, except his piece had finally jumped-up into the gear cluster and destroyed the matching first gear teeth, well I few of them at least. Like mentioned someone in the past had torn-down the upper end and replaced the small chain guide but never bothered to find the broken bits from the old one. I Always replace these when redoing an upper end! Even though they "may" look intact more often than not the rubber is getting weak. Remember this is Not a solid metal bracket coated in rubber. The section that is sandwiched between cylinder and case is All rubber up to about 1/3 the way up, when mounted. This allows for built-in flex but Non-maintenance/General fatigue/Age and You have a failure just waiting to happen