1978 Honda CB750K Maintenance: Carburetor Rebuild, Valve Adjustment, Spark Plugs and Points

I am blessed to have people trust me to work on their awesome rides. This Honda CB750K is in amazing original condition, I just had to get it running correctly again. Let's go through the carburetor, valves and ignition system and make this old beauty purr again!
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[@flipfix]

Working on a 1979 CB750K as of Dec. 2023.

[@TomsTinkeringandAdventures]

Awesome. Fun bikes.

[@facebook2k7]

Lovely example❤ Thanks for posting. Always wanted one and finally bite the bullet and got one, spent too much probably. Learning stuff online, loads of fun riding and wrenching.

[@TomsTinkeringandAdventures]

Good bikes, still a great machine to ride. Have fun with yours.

[@duaneanderson6392]

Had same bike same year and color. Bought new in 78 went on many trips cross country with it back then. Never any trouble to speak of. Sure wish I still had it!!

[@KowboyUSA]

Looks like the one I had back in the early 1980s. Like new.

[@TomsTinkeringandAdventures]

Really nice shape. Hard to believe you can find them like this, guy got it cheap too!

[@socalpat2000]

Awesome, friend has one I’m buying for $500 complete so I can’t pass it up. Been sitting for a few years and will need to do the carbs so this was perfect. I have found that it I ran vacuum tubes through empty & sealed 2 liter bottle then to gauge it stopped the flutter on the gauge. Thank for the great video.

[@TomsTinkeringandAdventures]

Interesting idea for the vacuum gauges. Hope your bike turns out great.

[@kurtbenzon7260]

Pretty sweet Tom!

[@TomsTinkeringandAdventures]

Yeah, I don’t have too much room for more bikes but I wouldn’t mind fitting this one in!

[@brianpeterson9766]

Nice work. Beautiful old bike. And worth a lot of cash in the current market.... even in SW Minn the used bike prices have risen by 20% the last 18mo.

[@TomsTinkeringandAdventures]

I was just thinking about the three old bikes in my dad’s shed…probably worth dragging them out now. Thanks for watching.

[@trustonlyline4206]

Pretty machine. Great microphone.

[@TomsTinkeringandAdventures]

Thanks for watching, it was an honor to work on this fine machine.

[@motorbikesandhacks]

Fantastic machine. I have a Carbtune II Pro, and to stop the gauges bouncing it has inserts in the rubber hoses which narrow the lines.

[@TomsTinkeringandAdventures]

Yeah, this mercury stick has little filters in the lines but maybe they are degraded because I’ve owned it for 25-30 years.

[@st-qd8wg]

It's easy taking carburetor out, pulling air box, losen screws and pulling back less than 10 minutes. It's out in your hand you make sound like it's defecult. This is the easiest motorcycle work on hope. Rest the viewer read this and make it happen.🤙

[@TomsTinkeringandAdventures]

It’s not bad, but it’s also not the most simple thing either. Not everyone has done this job before either.

[@st-qd8wg]

@TomsTinkeringandAdventures but I can say this it doesn't get any easier working on any machine 🤭

[@TomsTinkeringandAdventures]

@@st-qd8wg for a four cylinder bike this is pretty good. Air cooled singles are way easier, though.

[@Notthatdude]

I really needed to see thee position of the spring in the accelerator pump! Please let me. Know

[@TomsTinkeringandAdventures]

It’s my friends bike, I don’t think I will be taking it apart anytime soon.

[@AaronWilliams-hz6ju]

It's on the dry side, between the removable piece and the rubber diaphragm. Hope this helps 👍

[@karlvanboxel561]

Man that was one sweet example of a single cam that paint work looked flawless I’d be surprised if those pipes r original gee I think my old XJ 650 ones were rotted in less than 20000miles what oil would u run in that old bike I know it’s that age old question I’ve got an fz750 yam that’s nearly 40 yo and I run it on semisynthetic because I like the new technology of these oils but an old single cam might get clutch slippage I guess one of the forums would b a gd source of info keep up the mint work

[@TomsTinkeringandAdventures]

I don’t know about the pipes, I’m the bike ride was a Southern California example with low miles so maybe they are original. I put Shell Rotella T 15W40 conventional in my stuff, that’s what went in the Honda as well.

[@jwijn]

If I see your beyoutifel bike ,I,ve regret I painted my fueltank and completely neglected him and dont drive anymore for abouth 30 years.I had always problems with placing back the airfilter properly.

[@TomsTinkeringandAdventures]

Yes, the air box and filter assembly is difficult to work with.

[@user-sr5qd6pl1d]

How many turns out on air mix screen?

[@TomsTinkeringandAdventures]

Probably start at around 2 to 2.5, adjust as needed.