I made this list up some years ago. This version is arranged in Model Code numeric sequence. This code is found on the steering stem ID/VIN plate and Registration Papers. This is not necessarily the same as the first 3 places of the Engine Number.

MODEL       YEAR       MODEL CODE          ENGINE NUMBER

XS-B            75-76                 533                        447-500101

I’m sure it’s not complete. May include errors. If you have a machine with a model code not listed here let me know.

 

… by model code – page 01

 

… model codes – page 02

 

Or here listed by Engine Number.

… by engine number – page 01

 

by engine number – page 02

 

As you can see, there are questions. (???)

… my original tables included these model code/engine number combinations … they are not however confirmed by Yamaha … if you have a machine covered by one of these please let me know and I will reinclude it in the above tables

 

Have a Model Code that’s not listed here? Let me know.

I wish to get an idea of production runs. The engine numbers in the above tables are arranged so … 447-300101 to (400000). I have the start number for each model. Yamaha have given the absolute end number-these are in brackets. Not necessarily the real end number. Where I know this I have entered it without brackets … 2F0-000101 to 006141. The information is from Yamaha Publication #12100-100E1.

I’m looking for approximate end numbers. If you want you could leave me your model and engine number. No Name. No address. When left in the comment box below no one will see it.

I see someone was looking for M79-031. Service bulletin for XS750E and SE – shift mechanism adjustment.  For those who are interested, some time over the next wek or so I will post the Bulletins  for both twin, TX750 and triple XS750 models up to 81. Need a little time to sort them out and convert to jpeg or pdf.

Ok. Here we go. XS750 triple cylinder. 1976 – 1979. Became the XS850 for 1980-81.

• ’76 XS750C
• ’77 XS750D + 2D
•  ’78 XS750E + SE
• ’79 XS750F + SF

Look here for the Bulletins. Below is a list of contents …

• M6-018A-1 … XS750D ’76 Service Data, 2 pages.
• M6-018A-2 … Engine and Driveline Lubrication
• M6-020 … XS750D Clutch Boss Nut Replacement
• M6-030-1 … XS750D Special Tools
• M6-030-2
• M6-031-1 … XS750D Parts List Corrections
• M6-031-2
• M6-031-3
• M6-031-4
• M6-033 … XS750D Set-up Tuning for Best Performance
• M6-036 … XS750D Installation of Instruments
• M6-039A-1 … XS750D Driveline Cushion Modification
• M6-039A-2
• M6-039A-3
• M6-039A-4
• M6-043 … XS750D Front Wheel Set-up
• M6-044-1 … XS500C/D and XS7850D Cylinder Seal Size and Selection
• M6-044-2
• M6-047-1 … XS500C and XS750D Eliminating Excessive Brake Drag
• M6-047-2
• M6-063-1 … XS750-2D Service Data
• M6-063-2
• M7-011 … XS750D, XS750-2D Special Tools
• M7-013 … XS750D, XS750-2D Special Accessory Notice
• M7-022 … XS750D, XS750-2D Oil Sump Modifications and Oil Quantity Changes
• M7-023-1 … XS650D, XS750D, XS750-2D Changes to Splining of Transmission Gears and Axles
• M7-023-2
• M7-029 … XS750D, XS750-2D Driveline Modifications
• M7-038A-1 … XS750E 1978 Service Data
• M7-038A-2
• M7-050 … XS750 Bearing Housing Modification
• M7-051 … XS750-2D, XS750E Middle Drive Bearing Modification
• M7-054-1 … XS750E Additional Pre-delivery Services
• M7-054-2
• M7-061 … XS750E Defective Rectifier/Regulator Unit
• M7-073-1 … XS750E 1978 Service Data
• M7-073-2
• M7-074 … Shaft Drive Model: RearHub Lubrication XS750, XS1100
• M
• M  … I cant find the 1978 Bulletins – will post when found
• M
• M79-015-1 … XS750D, XS750-2D Float Pin Repair Kit
• M79-015-2
• M79-016-1 … XS750E, SE, F, SF Oil Consumption Diagnosis and Repair
• M79-016-2
• M79-016-3
• M79-024-1 … XS400F, XS750F, SF, XS1100F, SF Conrod Numbering
• M79-024-2
• M79-030 … Multi-cylinder 4-strokes: Carb Synchronization
• M79-031-1 … XS750E, SE Shift Mechanism Adjustment
• M79-031-2
• M80-022-1 … XS400, XS650, XS750 Factory Modification Campaign
• M80-022-2
• M80-022-3
• M80-022-4
• M80-022-5