Honda SOHC Four
Bulletins and Notices

This table merely enumerates the bulletins. The bulletins themselves are not on this site.
They are copyrighted, and requests to Honda for permission to use the material have gone unanswered.

350/400 500/550/650 750 General

TITLE DATE SUBJECT
350/400F #1 1-75 Disc Brake Mounting Bolts
350F #2 6-74 Correct Cam Chain Tensioner Use
350/400F #3 12-74 CB400F Wiring Harness Strap
500 #1 7-71 Tendancy of Exhaust Valves to Stick
500 #2 7-71 Oil Pump Precautions
500 #3 8-71 Cylinder Stud Removal
500 #4 7-71 Revised Shift Mechanism
500 #5 10-74 Oil Consumption
500 #6 11-73 Muffler Warranty Extension
Field Memo 1-3-75 Excessive Wear of Rocker Box
Field Memo 6-25-75 Revised Alternator Field Coil
Field Memo 7-11-75 Vibration Affecting Regulator
550 #7 3-76 Instrument Mounting Cushions
Field Memo 4-76 Anti-vibration Regulator Mounting
500/550 #8 8-76 Revised Rockerbox
Pts News 8-3-76 Revised Rockerbox
500 #9 8-76 Revised Clutch Adjuster
"Wrench" 6-80 CB650 Valve Cover Installation
650 #1 8-80 Poor Acceleration
"Wrench" 5-81 CB650 Head Torquing
"Wrench" 7-81 CB650 Faulty Exhaust Valve Guides
"Wrench" 9-81 CB650 Cam Chain Installation
CB750 #1 6-69 Charging System Diagnostic Tips
CB750 #2 5-69 Pre-Delivery Service
CB750 #3 6-69 Setup Particulars
CB750 #4 9-69 Drive Sprocket Recall
CB750 #5 9-69 Drive Chain Maintenance
CB750 #6 11-69 Cylinder Head Damage
750 #7 10-71 Air Filter Box Fasteners
CB750 #8 11-69 Bent Advancer Shaft
CB750 #9 11-69 Manometer Use
750 #10 12-69 Loose Alternator Bolt
750 #11 11-71 Front Brake Lever Freeplay
CB750 #12 1-70 Revised Break-in Procedure
750 #13 1-70 Revised Oil Filter Case
750 #14 10-72 Main and Rod Bearing Selection
750 #15 4-70 Throttle Cable Recall
CB750 #16 5-70 Camshaft Tower Caution
CB750 #17 5-70 Revised Drive Chain Oiler
750 #18 6-75 Drive Chain Type Caution
CB750 #19 7-70 Correct Cam Chain Adjustment
CB750 #20 7-70 Crankcase Breather Fitting
CB750 #21 7-70 Drive Chain Maintenance
CB750 #22 8-70 Chain Guard and Oiler Mods
CB750 #23 9-70 Excessive Front Brake Pad Wear
CB750 #24 8-70 Revised Output Shaft Bearing
Cust Letter 12-28-70 Throttle Cable Recall
750 #25 9-71 Linkage Type Carb Adjustment
CB750 #26 12-70 Brake Disc Mounting Bolts
750 #27 3-72 Spark Plug Fouling
750 #28 2-71 Drive Chain Installation
750 #29 4-71 Revised Crankcases and Output Bearing
750 #30 5-71 Drive Chain Oiler Adjustment
750 #31 8-74 Connecting Rod Weights
750 #32 8-71 Chain and Crankcase Recall
750 #33 11-72 Wiring Harness Routing
750 #34 5-72 Shimming Front Brake Caliper Mount
750 #35 11-72 Revised Oil Tank Feed Hose
750 #36 4-73 Rear Brake Wear Indicator
750 #37 11-73 Sprocket Manufacturing Tolerances
750 #38 11-73 Muffler Warr Extension
750 #39 2-74 Use and Removal of Revised Head Gask 
750 #40 4-74 Revised Shift Drum
750 #41 4-74 Revised Fork Seals
750 #42 7-75 Intro of Head Gask Stud Seals
750 #43 1-75 Revised Pos Batt Cable
750 #44 4-75 License Plate Bracket
750 #45 3-76 Instrument Mounting Cushions
750 #46 3-78 F Model Brake Pad Recall
750 #50 4-78 Automatic Fuse Box Recall
SL #83 11-72 750 Master Cyl Reserviour
SL #87 6-71 750 Final Drive Bearing
Service Rem 5-75 750F Fuel Tank Caps
"Wrench" 3-76 750 Clutch Chatter
Service Rem 8-76 750 Rear Sprocket Dimensions
"Wrench" 12-76 750 Clutch Chatter
Service Rem 1-77 750 O-Ring Chains
Service Rem 4-77 750 Pipe Bluing
"Wrench" 4-77 750 Cam Breakage
SL #108 10-77 750 Wheel and Tire Matching
SL #124 10-78 750 Speedo Cable Alignment
Pts News 6-4-80 750F2-F3 Fuse Box Recall
SL #84 5-71 Stellite Plated Valves
SL #85 9-72 Factory Chain Riveting Tool
SL #90 6-71 3-Phase Charging System Explained
SL #93 5-74 Battery Vent Hose Routing
SL #98 6-73 Batt Vent Hose and Drive Chain
SL #99 7-73 Availability of Manometers
SL #107 2-75 Sidestand Maintenance
SL #110 7-75 Bleeding Hydraulic Brakes
"Wrench" 11-77 78 550, 750 Carb Specs
SL #120 4-78 Fuel Filler Latch Recall
Though inconsistently labeled and more than occasionally incontiguous, these dates and titles are correct. The factory wasn't very careful in labeling back then, and many bulletins were ultimately superseded and therefore carry their revision dates. Others, for example, 750 #47, 750 #48, and 750 #49, are absent because they are bulletins regarding DOHC 750s, even though 750 #50, a later issue, concerns a SOHC.

Mike Nixon