Yamaha part numbers questions...

I'm sure someone here has the answer for this... What does the first three digits in the Yamaha part numbers mean? Usually that's a number(s) or two and then a letter...
The first question will probably answer the second question, but nonetheless if after the first three digits, the rest of the number is the same as another part number with a different first three digits; is that the same part?

For example would #10M-85752-00-00 be the same part as 15R-85752-00-00 which is for a different model, same year? The "10M" and "15R" must have something to do with the year and model.....

 

Year and model, Check out the first pages of this

http://www.xjbikes.com/Forums/viewforum/f=23.html

 

If by "same part" you mean they perform similar functions you'd be correct. If by "same part" you mean interchangeable, probably not.

In your example the first is a fuel sender for an XJ1100J, The second is for an XJ750J.

4XY-85752-00-00 is the fuel sender for the Royal Star Ventures from 99 on. Again the same second field but runs an actual gauge rather than a warning light. Won't even come close to fitting into an XJ tank.

The last field is the version number. When part numbers only vary in the last field they are probably interchangeable.

 

Not year and model.

You mean like "4G0" "4H7" "4U8" etc?

It's generally the model code of the series bike the part originally appeared on, IF it's a "model specific" part.

For instance: The 550 Seca has "4G0" part numbers (the original XJ400) and "4H7" part numbers (in common with the 650 Maxim) as well as its "own" model code, 4U8.

As a more specific example: The 550 Seca's front fender part number begins in "4K0" which is the original European-market XJ650 (1980) model prefix even though the fender was used on the 650 Seca (5V2) and 550 Secas (4U8) here. The "4K0" series bike was the first appearance of that part.

Clear as mud? Remember I said "generally" and it only applies to model-specific parts.

Now then, the "second" set of numbers DOES quite often refer to the same part (exhaust header for instance) from bike to bike, but if it has a different three-digit prefix it's DIFFERENT.

Example: PN 4G0-14621-00-00 is the #2 exhaust head pipe for the 550 Seca. PN 5G2-14621-00-00 is the #2 exhaust head pipe for a 750 Seca of the same year. They are NOT interchangeable. "14621" is the #2 header pipe part number for a lot of bikes, the three-digit prefix tells us what models they're used on (or more specifically, what model the part first appeared on.)

The two, two-digit sets of suffixes (-00-00, -02-00, etc.,) often denote a difference in finish or color between years or models if the first part of the number is the same (like the 650 and 550 Seca front fenderS that came in three different colors plus chrome.)

Make sense?

 

That is when Obelix taps his forehead with a finger and says "these japanese are nuts"!
Nuts and bolts, I would add. But jokes aside, it makes sense... when you learn it.