SOHC.co.uk Forums > Project Board
1967 CB450K0 Black Bomber Rebuild - By Royhall
royhall:
Ash. When you did the 500 carbs for that guy what internals did you use. Were they the standard 500 jets and needles or did you swap in the 450 bits just leaving the mixture screws as 500. Did the guy ever get back to you to say how it was running.
AshimotoK0:
--- Quote from: royhall on January 18, 2024, 09:58:12 AM ---Ash. When you did the 500 carbs for that guy what internals did you use. Were they the standard 500 jets and needles or did you swap in the 450 bits just leaving the mixture screws as 500. Did the guy ever get back to you to say how it was running.
--- End quote ---
I fitted the NOS parts from the same kit I sold you and 130 main jets. But obviously the air screws were different style to the K0 ones .. so I cleaned up the original 500T ones, and fitted a new(tiny) O-ring.
Annoyingly, after considerable effort I suspect he has never tried them. I really must call him. I went to all of the effort because his friends rallied round told me he was feeling really low and badgered me to put a set of carbs together.
royhall:
That's annoying Ash. If he doesn't want them I can give them a new home.
royhall:
Finally got around to the Bomber carb job. Started by stripping the diaphragm housing off the side of the left hand carb as that one can be done with the carb in place. As the carb man said he had deactivated the unit I was a bit surprised at what was in there. It was a fully functioning valve complete with brand new diaphragm.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
The silver centre part of the casting is actually some sort of valve that the diaphragm rod presses against. After a bit of cogitation I decided to leave the diaphragm housing alone. So instead of trying to randomly block off holes and make a mess, I decided to make an aluminium plate to cover the three ports and just leave the casting off. This has the added benefit of being easily reversed should needs arise. It also makes the carb look a bit more like a 450 item.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
That's the easy side done, the right hand side needs the carb removing to get at it as the diaphragm housing is on the inside between the carbs. That's a job for another day.
mo goldie:
Hi Roy
I thought the Bomber did Not have them ? thought that they were the later Carbs ?
Oh can I ask might be a silly thing but how do the petrol Tank feed each side of it as seems to leave loads in the left side of it when the right is empty ? there is a blanked off bolt in the left side but how do that link to the right side ? have you got any pictures to show how please. also still need some help on what rectifier to use as well ?
Cheers Mo
Oh just seen the rest of the thread..did Not Know you were trying out 500T carbs sorry Roy.......but help with the other would be great ;D
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version