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1967 CB450K0 Black Bomber Rebuild - By Royhall
royhall:
Thats handy Ash if your in the market for a "Massive Frame".
I mentioned earlier that I had too many projects on the go to get the Bomber in the garage at the moment. Does anyone else have this same problem, plus I have another lock-up that looks about the same?
CB350F at the back still waiting for me to sort out the smoking on pot 4 issue, GS1000 at the front still waiting for it's tank back from Menno, CB750F2 that is the only bike I keep taxed and tested all year round and ironically it's the only bike that needs tax and test. Next year they will all be free, Hurrah.
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Laverda Dave:
My garage is the same Roy. Too many bikes and not enough space anymore! The Triton is now sitting outside under a tarp since I restored another 400/4. I need to sell a couple of bikes before I buy anything else. Problem is which one do you get rid of, they all have a special reason to be kept!
royhall:
Been a busy time getting the remaining parts off the engine and degreasing to get them as good as possible. The PO supplied a spare set of crank cases with the bike so those were brought out of storage to be inspected. Unfortunately the bottom case has some bad cracking along the front as if it had been hit on something.
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It certainly looks like it's taken a fair few impacts to the front. Can't be a kerb as it should be protected by the frame. After looking into getting it welded up it was suggested that I check the part numbers to see if they are a matched set. And sure enough the top and bottom cases have different part numbers, so after checking the original set, I am using the replacement top with the original bottom. So after a good bit of masking up and fitting scrap bolts in threaded holes the cases were sent for vapour blasting and the rest for bead blasting. These days it's probably better to get it all soda blasted but my guys are local and are very careful. Obviously they need a severe cleaning afterwards to ensure no grit remains. They came up really well.
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Been busy with the scrap plywood offcuts and the jigsaw and made myself an engine stand. Not too shabby and cost nothing.
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Tha alternator cover has not done too well in the past. This is what happens on a 450 when you fall off left hand side. The gear change lever goes straight through the case. These things are super rare as a great many were damaged so stocks are gone. Will keep looking though you never know. My plan is to remove the epoxy repair and get it welded up, then either a ceramic or powder coated chrome finish. Should work okay.
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Whilst I was waiting for the blasting I sorted the carbs out and sent them off to Matt Harper for repair along with all genuine gaskets, jets, needles, and springs. The remainder of parts are good quality pattern such as the floats. Not sure what Matt will find on these as they dont look to be in too good condition and there is some damage to one carb but I have managed to source the correct parts to repair that.
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Next job is the bit I never look forward to, that's masking up and painting the parts. After that it's off to the machine shop to get the required carried out. More soon.
MrDavo:
With almost any other engine I’d be saying ‘oh no you can’t mix crankcases’ but with the unique design of the bomber, as long as you use the bearing caps that came with the top half, I don’t see that it matters. Mine have machined pairs for the outer bearings but not so on the four speed.
I had similar problems with the CL450 alternator cover, mine had been attacked by a gear lever too. I couldn’t find the right cover unmolested, but winged it with one off a 500 twin eventually.
AshimotoK0:
--- Quote from: MrDavo on February 22, 2019, 11:03:38 AM ---With almost any other engine I’d be saying ‘oh no you can’t mix crankcases’ but with the unique design of the bomber, as long as you use the bearing caps that came with the top half, I don’t see that it matters. Mine have machined pairs for the outer bearings but not so on the four speed.
I had similar problems with the CL450 alternator cover, mine had been attacked by a gear lever too. I couldn’t find the right cover unmolested, but winged it with one off a 500 twin eventually.
--- End quote ---
CB250/350K , even though they have the bearing arrangement like the CB450 5-speed are not matched and have separate part numbers. I thought the only Honda's this is not the case with are the models with shell, plain bearings.
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