1967 CB450K0 Black Bomber Rebuild - By Royhall

[royhall]

Hi Mo. Did you ever get the electronic ignition working? The hanging idle is often caused by worn out springs in the ignition advancer. Very common problem. Also check the clutch cable isn't fouling the throttle as it's close to it at the carb end. Did you fit the springs in the vacuum chamber?

[royhall]

Forgot to say, the kits I have ordered are made in Taiwan by a company called Daminedin and they have really good reviews. The dodgy items that people are struggling with are the Keyster kits. I also wonder if people are assuming that all 450 carbs are the same, there are at least 4 different versions of these carbs (not including the 500T version) and only a kit made specifically for that carb type will fit correctly. The ones I have ordered are specific for 14H and 14L only. I'm not surprised people are having problems with 450 carb kits. I have a chart somewhere detailing a lot of the changes, I will look for it tomorrow and post it here.

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[mo goldie]

Hi Roy

yes the electronic ign is all on and working ok, the springs were all checked when I done the ign so they are ok and the clutch cable is not in the way...... the spring in the Vacuum chamber they was None in them so No I have Not got any of them Pity I would have put some in as I say if it came with them 

the carb kits I got were from Wemoto and had the Needles with clips so set them at 3 up from bottom and the air screws were as I said set with a colortune and think they were out about 1 turn out in the end ...... wonder if Ashley had some kits would have got them


but the other thing is the charging as I don`t think it is as the battery after using the E/start a few times brings the Battery down...... Not sure how to check it as I don`t think by putting a meter across the battery tells me anything so don`t know how to check out the charging system ..again pity you Boy`s were Not anywhere near me for a look at if you know what I Mean.

 

[royhall]

For the charging issue have a look here.

https://r.tapatalk.com/shareLink/topic?url=http%3A%2F%2Fwww%2Esohc%2Eco%2Euk%2Findex%2Ephp%3Ftopic%3D25561%2E0&share_tid=25561&share_fid=50581&share_type=t&link_source=app

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[AshimotoK0]

Forgot to say, the kits I have ordered are made in Taiwan by a company called Daminedin and they have really good reviews. The dodgy items that people are struggling with are the Keyster kits. I also wonder if people are assuming that all 450 carbs are the same, there are at least 4 different versions of these carbs (not including the 500T version) and only a kit made specifically for that carb type will fit correctly. The ones I have ordered are specific for 14H and 14L only. I'm not surprised people are having problems with 450 carb kits. I have a chart somewhere detailing a lot of the changes, I will look for it tomorrow and post it here.

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What are the significant differences Roy? Could it be that they are related to the K1 and 5-speed  engine components/characteristics? I would have thought that the needle and it's associated jets could be used on the later carbs and therefore closely match the original K0 engine characteristics. Problem is, I have a few K0 carbs (and 500T ones) but no later ones to compare the differences.

[royhall]

I am going to look into this later in more depth. I do know that the K0 carbs are quite different from the K1 mainly around the throttle spring area, plus a few of the K1 brassware items don't fit the K0. The carb body castings are also quite different. But for now, here's that table. You can see from this that the 14H and 14L are different to the rest.

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[mo goldie]

Hi Roy

Thanks for that but still can`t work out as the Bomber has Not got a Regulator I need to go more into how the wires come out of the stator and then go into the rectifier colour wise.......

the other thing you said about was the springs for the vacuum ...where can I get two them from as it might help with shutting of the slides faster and might help with the revs coming down quicker ?

I think that the wiring get beyond me as looked at the diagram and it more like the Birmingham road layout..... Not good with electrics    

[Bryanj]

Didnt think the 450 had a regulator, the rh swich brings more coils in when you turn lights on

[McCabe-Thiele (Ted)]

Just read this post & the link to Roy's bike - very interesting & informative read.

[AshimotoK0]

Hi Roy

Thanks for that but still can`t work out as the Bomber has Not got a Regulator I need to go more into how the wires come out of the stator and then go into the rectifier colour wise.......

the other thing you said about was the springs for the vacuum ...where can I get two them from as it might help with shutting of the slides faster and might help with the revs coming down quicker ?

I think that the wiring get beyond me as looked at the diagram and it more like the Birmingham road layout..... Not good with electrics    

I thought I had sent you the colour matching of the old and new alternators Mo?
If not I will sort it out tonight for you. It's a fairly simple system really.

Sadly, I had quite a stock of the rare carbs piston return springs but they all went pretty quickly and I don't have any spares left. I even sold a set to Penelope Keith's husband !    So he must have a Bomber.  16186-283-305 was the part number if you can find them.

I was selling the whole upgrade kit at one  point but only have the odd part left now.

[mo goldie]

Hi Ash

I seemed to have lost where they went now... but if you can refresh me with it all would be great, as for the Carb kits that would have been good to have them, it was Roy who said about the springs as mine never had any in the carbs but I think they would help in keeping the slides down a bit faster to the bottom,

well My problem was the Needles Ash as in mine they were bent but when I got the new ones they came with the circlips on the Needles so just set them at 3 up.... as the ones in there were the same as you have in the picture which are fixed.

getting back to the charging I went and had a look at again today engine running battery went from 12.8 Volts engine off then 12.3 engine running put lights on and went down to 11.8 ....so I Know its Not Charging.... oh the Battery is as New and is an AGM .....

Oh I wonder if he has taken her on the back of the 450  

[AshimotoK0]

Here is what I sent you before Mo.

[mo goldie]

Are thanks Ash

all clear but I don`t have a red/white .........just white I think will have a look tomorrow 

Pity about your carb kits ....... have you still got any of the needles without the circlips the ones in your picture ?

Cheers

Mo

[AshimotoK0]

Pity about your carb kits ....... have you still got any of the needles without the circlips the ones in your picture ?

Cheers

Mo

May have needles and tubes .. can't promise though until I check.

[mo goldie]

are ok Ash that would be good thanks ...as I say mine were all bent up

Oh don`t know what size the bomber springs are or what size theas ones are I wonder 


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