Topic: 78' CB 750 F Super sport

[BigPauly]

Found the ticking was actually a broken intake valve #3.  Does anyone know where to find intake valves for a '78 CB 750 F Super Sport?

Seems like I've been searching and those places that list them, are backordered indefinately!!!! 

[BobbyR]

Sadly the F was known to have valve issues. I think a K head would fit.

[BigPauly]

Will K Valves Fit?

[Joe Mig]

Try
http://www.bikeboneyard.com/

[bryanj]

Send the head to mreik for a port job and he will get valves and guides but i think they have to be a different stem diameter and no K valves wont fit but a complete K base gasket upwards will

[MotoMartin]

Put an ad in the wanted section on this site.
I needed just an exhaust valve for the same bike as you have, and a member came through for me.
Gotta love people who come up with a $1,000 fix for a $20 problem.
If that fails these guy's have valves, but you have to buy a set of 4.
http://www.dynoman.net/engine/valves/index.html#F2
If that's your bike in the avatar, it's hard to tell from such a small picture, but either someone removed all the black paint from your motor or you already have a K motor. Check your engine number.

[Joe Mig]

Here is a link to a timeline so you can look up what year motor you have on the bike . http://hondachopper.com/modifications.html
Make sure on the year before you do anything.

[MRieck]

 First off what to you mean a "broken" valve? Bent? Destroyed tip? I think of a broken valve as the head coming off the stem. Measure the head diameter..32mm is a K and 34 is an F. If it is a K valve look at the keeper groove to see if it is late or early type.

[BobbyR]

First off what to you mean a "broken" valve? Bent? Destroyed tip? I think of a broken valve as the head coming off the stem. Measure the head diameter..32mm is a K and 34 is an F. If it is a K valve look at the keeper groove to see if it is late or early type.

The Oracle has spoken, you are in the best hands possible.

[BigPauly]

The stem is broken.  No valve pieces into the cylinder. 

I was able to locate another head and a gasket kit.  The folks here and at the two links below really helped me out!  I appreciate it.

www.bikeboneyard.com
www.troycitygarage.com

[Joe Mig]

I hope it all works out for you. I bet it did not cost you 1000.00 eather.
Here is the time link to look ou what you have . http://hondachopper.com/modifications.html

[BigPauly]

So far about $210 in parts, I'll begin tearing it down tonight, doing some cleaning, and hopefully it all goes back together nicely. 

[MotoMartin]

Did you find out what year motor you have before ordering the parts? It's kinda important.
(I would not just assume that it's a '78 750F motor, based upon what it looks like in your avatar).

[bryanj]

A new valve was never a $20 problem! Even when the bike was new they cost more than that + the gaskets + time etc etc

With the known problems the F2/3 has with the valves and guides it is not unreasonable, having no visual input and no history to think that all valves/guides will need work and suggest the best way to fix it permanently