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Your link came up with 50 images and unfortunately I will not be here to weed through them as I have just elected to leave this site. Luck.

You have to use english in the right way. You said 'I heard...' rather than 'Can you do this?'. If you heard then why would you be asking the exact same thing again??? '.... is separate from the petcock...' DID answer your question so the not helpful in any manner thing is wrong as the words...

Remove a fuel bowl and the rubber plug and look at slow (pilot) jet, if no screwdriver slot then '80 and earlier, if it has screwdriver slot then '81 and later, the jet unscrews. The early ones are pressed in.

Trying to remember what locates the grease washer, it may locate on a step in the stem OD. You actually could likely make one up out of thin metal plate or a big washer. You actually can simply install a grease zerk in the head and fill the entire head with grease but the excess amount will...

You are not showing all the wiring there, there are TWO battery leads going to the solenoid, it cannot work starter otherwise. One small one switches it on and off, the other is the huge big battery cable to starter that the smaller wire connects up when on and the big cable does not fuse at...

Partzilla.com shows the locking one to still be available here USA. Use '83 CB750SC (Nighthawk) as the bike type, the only 750 sold here in '83. David Silver spares should be able to get it.

Leaning toward battery, you only have 150 amp cap on a 110 amp current. Most batteries you pick double the starting current to easily cover it. Look at cars, 500 amp battery minimum to cover up to 200 amp starter. That 14ah was picked for a reason. You've gone too small, what so many do when...

PartsNMore are Chinese parts and likely the others too. Unless they specifically say they are not. I have used them but the needle tips are what bite, ethanol swells them and they also stick from drying up since ethanol dries up in bowls like 10X faster. Pretty hard to get needles and I never...

Pic the damage. Likely part of carb body and no part other than new carb..

The vacuum unit on a DOHC is separate from the petcock and often mounted on the other side. It has a vacuum hose going to the #2 carb from the left sitting on bike.

Randakk's if they still do them or Mike Nixon at the Motorcycle Project website but both are expensive. To get fine quality float needles instead of the Chinese crap stuff. If they put ethanol in your local fuel and you are having flooding issues they will likely continue, open carbs to air like...

What were the compression numbers? And having to set different idle mixtures for different cylinders is proof of needle seat damage from overtightening closed or idle fuel feed circuits are still partly clogged. Ideally they all use the same setting. Changing plug often appears to be the...

The clutch diode prevents conflict between the neutral light and the clutch handle starter safety switch. Not being there power can go backwards from neutral into the clutch switch in a direct short. Battery runs down if not a fire outright. You need skills to do that workaround as well as to...

The ONLY thing that causes idle hang is vacuum leak, ort cracks in rubber manifolds, or sticking throttle or sync with the carbs ending too high at butterfly slightly open. Lean and rich will NOT do it. Engine state comes into that, lack of compression makes you open the throttle too wide to...

Neutral circuit (clutch diode) is green/red. Power to ignition switch red. Charging output from regulator to battery is red/white. starter circuit is red/yellow. You have to positively change something up, you can't just drop the diode-gone the neutral switch won't work. The leads tied...

FYI Euro models do not have accelerator pump as they have a slightly richer idle/off idle setting than US ones do. US ones also had idle limiter caps to stop people from adjusting the idle mixture. The aircuts figure in that too, they lean the idle an additional amount and I tend to defeat them...

If the OEM part they leak because a crap tar compound that melts at 100 degrees was used to seal them. Typically it drips off to leak on things and typically the box stays OK because the tar even in a thin layer tends to still completely coat electronic parts to keep them weatherproof. Even...

Normal idle speed is around 1000-1100 rpm. Syncing commonly causes carb idle to hang high at throttle closing if synced with all 4 too far open. The cure is backing off throttle speed screw but then older motor doesn't want to idle that slow at closed as far as it needs to be to stop the idle...

The inline 4 bikes just run lean in those years, counting the entire later DOHC pack of '84-'86 550, 650 and 700 I can't say I've seen 10 of them total since they were made except when I walked into a showroom. Honda was too busy thinking V-4s around that time. Then most who bought them never...

The 550 engine looks closest but the stroke is a lot shorter making the cylinder block shorter too. That makes the exhaust pipe shorter in the vertical run to likely hit bottom of engine with no clearance at the pan.

Got a '77 CB550 and same as 500 and no way does it fit. And virtually all Honda DOHC change pipe systems, they hardly interchange at all other than the 750-1100 early ones. There was a DOHC 550 Nighthawk, that one might be close. The early 650 SOHC definitely does not fit. Honda changing...

The numbers may be real. Getting the same twice reinforces that. Common to be off either way easily .0125 mm. or a half thou. it's often there for the finding when you button things up to check.

https://boldorclub.nl/wordpress/wp-content/uploads/2015/01/honda_carb_manual_revf.pdf Partzilla.com

Part of that work is heavily skills based. Why you measure the big metal journals too, to add emphasis on which way you are going. With spaces that small even dust on bearings or oil can foul the numbers up. look at how tight you tightened the cases up.

You can't simply swap tanks around, the fitment can be different on each and often the side covers or seat fronts will not fit with a non-OEM tank. The frames are pretty close to the same until they begin to weld on all the detail brackets, that changes everything.

They are pretty much identical until you get to the back mounting point which may vary a little bit due to the styling cues back of the footpegs.

Use .15 mm. as a max not .17. You can go as low as .10 mm but NO lower and the number needs to be firm. I use .10-.15 (.004"-.006") #4 is messed up, and one intake each on 1 and 3. Shims do not get thicker unless rough wear on them and toss one like that. You can change them around until you...

Check the working of the front brake. When they sit often the hydraulics go bad to stick or not work.

'70s bike. Not running makes value lower.

Go to partzilla.com and the rear wheel of '80 750F with disc brake and there are spacers on either end of wheel between the chain adjusters. One inserts into sprocket side seal and sticks out a bit, on the disc side there is a thicker one and the one picced here...