Neils 1978 CB550 F2 Project - Newbie Let Loose

[Nurse Julie]

If your brass bits are OEM Keihin, thoroughly clean all the brassware, jets, emulsion tubes etc by removing them, then re use. Fit all new Viton O rings (I stock the kits), re use the top gasket.
Carb cleaner is good but make sure you get it in all the hidden passages. Ideally, an ultrasonic cleaner is best (after removing all the internals) then you can get the entire carb body thoroughly clean. But, if all you have is carb cleaner, use that.

[Neilw]

If your brass bits are OEM Keihin, thoroughly clean all the brassware, jets, emulsion tubes etc by removing them, then re use. Fit all new Viton O rings (I stock the kits), re use the top gasket.
Carb cleaner is good but make sure you get it in all the hidden passages. Ideally, an ultrasonic cleaner is best (after removing all the internals) then you can get the entire carb body thoroughly clean. But, if all you have is carb cleaner, use that.

Thank you. Will I be able to tell if the Brass bits are OEM?

[Nurse Julie]

Yes, the jets will have the Keihin logo stamped on them, it's a letter K that almost looks like a star shape.

[taysidedragon]

If your brass bits are OEM Keihin, thoroughly clean all the brassware, jets, emulsion tubes etc by removing them, then re use. Fit all new Viton O rings (I stock the kits), re use the top gasket.
Carb cleaner is good but make sure you get it in all the hidden passages. Ideally, an ultrasonic cleaner is best (after removing all the internals) then you can get the entire carb body thoroughly clean. But, if all you have is carb cleaner, use that.

What Julie said is good advice, but don't mix up the parts from different carbs. Use a pot or tray for all the parts from each carb.

[Oddjob]

Replace the fuel pipe as well, the old one will most likely be going hard and cracking.

Check the needle clips are in the right slot and the jets are the correct size, you never know who's been tampering with them over the years.