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1967 CB450K0 Black Bomber Rebuild - By Royhall
florence:
I would say changing to slide carburettors is a good move. Over the years I had so many problems with the CV carbs on my CB350, despite careful maintenance. Often, the slides would stick, seemingly dependent on the weather, and suffered the same rich running problems you describe. Sometimes I could 'nudge' a stuck slide by feathering the choke momentarily. In the end I swapped to 32 mm Amal concentrics which oddly enough had come off my friends 1969 Black Bomber, a modification that had been done in the early 1980s to cure this same problem. The bike now runs really well and is much more responsive at all rev ranges, all the hesitancy I used to experience is gone.
If I could afford them, I would use Mikuni slide carbs but these Amals seem to be working very well so I will stick with them for now.
AshimotoK0:
--- Quote from: florence on August 01, 2024, 09:26:03 AM ---I would say changing to slide carburettors is a good move. Over the years I had so many problems with the CV carbs on my CB350, despite careful maintenance. Often, the slides would stick, seemingly dependent on the weather, and suffered the same rich running problems you describe. Sometimes I could 'nudge' a stuck slide by feathering the choke momentarily. In the end I swapped to 32 mm Amal concentrics which oddly enough had come off my friends 1969 Black Bomber, a modification that had been done in the early 1980s to cure this same problem. The bike now runs really well and is much more responsive at all rev ranges, all the hesitancy I used to experience is gone.
If I could afford them, I would use Mikuni slide carbs but these Amals seem to be working very well so I will stick with them for now.
--- End quote ---
I went to Newark a couple of months back and a bloke was selling an early CL350 and it had been fitted with some Chinese carbs and was running really sweet. ..He races CB350's so must know a bit about them. I bought his old carbs for £20 and the diaphragms in them were perfect so a good buy for me.
Somewhere in my stash I have a pair of CB750 carbs that had been modified to use on a CB350K (albeit a racer that was bored out from 325cc to 350cc)
mo goldie:
I can get hold of a pair of T500 carbs... so will see how bike go`s tomorrow as out with a few mates and one is a T500 which he just got on the road, and he has the Carbs so will keep that in mind............ BUT like Ash I like to keep it with what it was made with ( Even tho they are a pain in the ass ) and like Roy said it don`t take much to upset the running of the bike being weather related or mixture related, anyway I will see how she go`s tomorrow fingers crossed ;D
if you do go down the route Roy with the Mikuni Carbs can you please keep us all updated on where you got them and how much the Kit cost and if it has helped.... I here they is a few changes to be made to fit them as the kit don't come with all the parts needed to do the Job.......but that's what I read anyway.
royhall:
Unfortunately the Mikuni kits are about £475 including delivery. If they had been £175 they would be on the bike now. Also, they only fit K1 onwards and not K0 so you have to pay another £45 plus delivery for cranked pod filters to fit behind the bomber side panels. So they really are a last resort that I'm hoping I won't need.
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