The great oil pump mystery...these are three oil pumps fitted to the CB450-500T..K0 to 500T
These first two pumps are NOS and removed from their packets for the photo's.
The first K0, Part number 15200-283-000 is from the first production bike # 100046 till the last K0 with no revisions. Cast iron with an alloy small diameter piston, 16mm.
The second fitted to the K1 and K2 and issued as a first revision, 15200-292-010. I have not found any evidence of the "000" pump being issued or fitted and can't find any information on what the revision was. Also cast iron and with the same size piston, 16mm.
The third pump was revised and fitted to the CB K3 (319 code) and used by all CB/CL450's and 500T's from then till final production 15200-319-003. Alloy body, steel piston with a diameter of 19mm.
CB500T parts list, note the same part number as the K3
I hope that clears things up nicely, i have not been able to clarify if any of the early revision pumps were ever fitted or were these just in house revision, done preproduction, which seems to be the case
