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1967 CB450K0 Black Bomber Rebuild - By Royhall
AshimotoK0:
Green wire goes to earth ( negative battery)
royhall:
Cheers Ash.
royhall:
Sorry there hasn't been too much action on this thread for a few weeks. I have been stuck for parts returning from chrome and painting etc, you know, the usual frustrating stuff. Almost all the plating is now back except for one exhaust header pipe and the headlamp rim both of which were down to my error. Half the painted parts are back. These are all the black bits (and there's a lot of them no wonder it's called a Black Bomber). The silver bits are still not done after they have had them for over 6 months. The guy does a good job at reasonable price, but 6 months for plain silver and black parts is too long. Remember there's no multicolour masking or decal work to be done, just straight paint, and he was still working through lockdown so no excuses there. Moan over.
I have been using the time to try to get some sub assemblies built up. The air filter modification (as mentioned earlier in this thread) to use the later filters has worked out well and required no more fasteners to hold in place. I just need to be careful when changing the filters elements as the link pipe is not held in place by anything but the filters. That said, how often are the filters going to be removed, probably never. And not a hint of Gaffer tape in sight.
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I attempted to remove the swingarm bushes before it was powder coated without success. They were hard in there and no way to get a purchase on the edge of them to drive them out. The powder coat guy gave me a great tip. He says he gets swingarms in with the bushes still in and not blanked off. He said they often fall out when the coating is baked. With that in mind I blanked off the bushes with steel plates and thread bar and sent them off to be coated. On return I found they were that loose I could pull them out with an angled pick. It appears that these sintered bushes shrink when heated, how weird. Anyway, job done. The new bushes went in okay with a good interference fit, and were pulled in using the old thread bar and washers routine.
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I fitted the swing arm using all new thrust washers and seals from the Pirate.
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The swingarm went back into the frame with ease and was bolted up with the re-plated bolt and nut. I gave it a good shot of lube from the grease gun until it showed at the joints. On checking the arm was free to move in the up and down axis with no side or twisting play.
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I should comment at this point about how rough some of the parts look. This is in no way the fault of painters or powder coaters etc, it is how these parts are. The whole bike is a bit agricultural and by no means as well made as we have come to expect on the later fours. I could have spent hours polishing everything to a flat surface before coating but that would not be authentic, and a complete boring waste of life. So they are staying as Honda intended. That said the alloy polishing guy decided not to follow instructions and went down the show pony route. Bit hard to ring a guy to complain he had done his job too well. More on that later.
royhall:
Talking about the "show pony" finish on the alloy. At no time has Honda's Black Bomber been sent out of the factory with a shine that you could shave in. Quite the opposite, like most of the bike it was in a "that will do" condition. So here's the dilemma in pictures.
This was the finish I was looking for on the wheels. You know the clean not over polished thing.
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Now with the brake plate fitted.
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I'm hoping that a good wipe over with ACF50 and the passing of a bit of time will dumb down the shine a bit so it blends in. The polishing guy could have saved himself a good few hours work there. But as I said before, how do you knock a guy for doing the job too well.
Talking of overdone bits, here's a picture of a few that got into the wrong box. They got chromed when they should be BZP. There's the fantastically polished and chromed figure 8 plate holding the shoes in, and the polished cams opening the shoes. They have to be an award winner at any show, I mean who else chromes the insides of the brakes. ;D
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Building up the handlebars next. After putting them in the vice so I can fit the electrics I realised they were bent on the left hand side. I knew the bike had been down on that side quite hard, probably what put the bike off the road in the first place. Time for a bit of force to see if they can be salvaged. The big pipe came out to assist with leverage.
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A good bit of pushing and pulling whilst being carful not to damage the chrome had them dead straight again. After fitting the polished and serviced electrics and lever mounts I fitted a new pair of genuine levers and grips. I think they came out really nice.
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The grips as usual didn't want to go on. I have in the past been wary of using lubricants to get grips on as they usually come loose again later and your forever pushing them back on. A little trick I learned for this is carb cleaner, a good spray on the steel parts has the rubber pushing straight on then a few minutes later the cleaner has evaporated and the grips go super tight. But make sure they go on right first time as you wont get them to move again.
royhall:
Just a few shots of where I'm up to that don't need much explanation.
The handlebars fitted to the top yokes and mounts.
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The new Hagon shocks and grab bar fitted with all new bolts.
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Front view with the bespoke made sticker (thanks Piki). The frame stamping was masked off before powder coating as it needs to be visible. I cant risk it being hidden as I don't have a current V5C only the old style V5 and there may be an inspection required at some point, who knows. I sprayed the headstock with three coats of clear to stop the number from rusting.
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Various other assemblies ready to go.
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So that's where I'm at now. Am hoping the silver paintwork returns next week so I can get the forks built up and fitted. I also need the rear mudguard fitted so I can find a space for the extra electrics ie the regulator and the control box for the electronic ignition.
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