Well the reason I went with them versus another company...............
CycleX as been rebuilding and selling CB750 parts ,,,,,,,,,,,,,,,,,,,,they have been in business for over 40 plus years Thats all they do PERIOD
They are others company's selling the rebuild kits but its like any other item you buy "you get what you pay for" just my opinion. I would rather pay little more for something that I know that as been tested and used by many other people.
Most the "rebuild" kits you see on other places do or dont have all the parts.....................I purchased a oil pump rebuild kit off ebay and the parts were not in spec as measurements of the rubber oil stopper was smaller and the oil screen was to big.............................i got the cyclex kit it was dead on perfect...........................
In long run if there is no wear on on gears between them if its less than .003" your good if more than that you need new pump .........................................
Great vid to watch is Dino's vid heres a link
https://www.youtube.com/watch?v=L-nqD0KxM5E&t=2s&ab_channel=HackaweekTV