Exhaust Head Pipes and Yamaha part numbers

I have a set of 4 OEM pipes in good condition from the XJ700N.
The only problem is a deep dent in #4 half way up the vertical section.

I've seen a brand new #4 piece on e-bay for the 650 Maxim.
Does anyone understand the Yamaha part numbering system to state if it will fit with the 700 set?

Here are various p/n's I dug up for #4 pipes with 52.4 mm stroke.

1986 XJ700N 1FG-14641-01-00
1982 XJ650Max 4H7-14641-02-00
1982 XJ650RJ 4K0-14641-01-00
1982 XJ650LJ 16G-14641-00-00

all the pipes share 14641.
#1 is always 14611, # 2 is 14621 and so on.

 

if it is the same part it will be the same part number from beginning to end.

if pipes are painted it will have a different part number then the chrome which would be the exception to fit with different part number

 

The easy way is to look the part up on any Yamaha dealer's online parts fiche. Most have a feature that allows you to input the part number and search for all the machines that part was used on.

 

No one does, not even Yamaha.........

Typically, header pipes are designed for specific models........their length, bend angles, and "reach" (to the collector box) differ to accommodate engine placement in frame vs. collector box style (and XJ650 Maxim models didn't even use a collector box.....). Also, on some engines, the pipe tube diameter is different; for example, the turbo pipes are small in diameter compared to the XJ650 Maxim's.

 

I was aware of that, they might be a different length on account of that.

OK, I guess there is no way to know unless you were to line up the pipes side by side.
I see the 650 Max starts with 4H7 and the 650 Seca is 4K0.
Has anyone seen these prefixes mixed in with other model part list

 

The prefix denotes the model that the part was first used on (unless the part was revized or replaced in the system by a functional equivalent from a newer model). The Seca has an exhaust collector, the Maxim does not. The headers are not interchangable between the two.

The parts lookup shows that the XJ700 headers were unique to that model, though it is very likely that a set from the aircooled Canadian XJ750 from the same years are the same part.

Of course....sometimes there are ways to make things fit.

 

The differences in header pipe design can be fairly subtle. After you filter via the "pipe diameter" issue, then a side-by-side visual can be made, but be aware, that almost ANY differences in the input angle (into the collector box) will cause problems "further back" into the rest of the system. Tilt the collector box at a different angle than stock, and then the mufflers won't line up properly, etc. Although sometimes things like that can be compensated for, things can get ugly quickly...........

 

Ok thanks guys, I just noticed the starter on my turbo motor is 4K0, so same starter 1st used on the 650 Seca.