RD 250/350 Crank Assembly P/N oddity

[RDnuTZ]

Been collecting parts to finally get a couple projects going and reviewing everything I think I know/knew before getting started. Q: I was previously under working assumption 73-75 RD 250/350 cranks were fully interchangeable and that still seems the case- but- Yamaha oddly changes formatting of crank assemblies using same numbers.

RD250: 360-11400-00-00
RD350: 36-011400-00-00

Any significance to that 

[SoCal250]

Any significance to that 

No. The "36-011400-00-00" is simply a formatting error. Many of the old parts lists somehow were mis-formatted over time so the dashes in some part numbers are shifted. You will find that these part numbers are usually labeled 'UNAVAILABLE IN PRICE BOOK' as a result.
For example, the crank in my 350A digital parts book shows up as: ¢36-01140-00-00  UNAVAILABLE IN PRICE BOOK

Correct formatting for a general part is 000-00000-00-00
The first 3 digits is the model family
the next 5 digits is the basic code which is made up of: first digit is bike section, second & third are the location, and fourth & fifth are the part number.  So, for example, a crank assembly will always be -11400
the next 2 digits is the design code number (the first one is the version, the second is the revision number)
the last 2 digits is the color code or material finish

[RDnuTZ]

thanks for confirming  that was what I assumed. I bought a couple of those HPR cranks and they have separate items listed on eBay for both RD250 & RD350 with slightly changed P/Ns in auction titles- but they are both same price and both arrived in boxes marked RD250 Air Cooled. They look identical but I had not measured anything yet...