SOHC.co.uk Forums > Project Board
1967 CB450K0 Black Bomber Rebuild - By Royhall
royhall:
Sorry it's been a while since I last updated this thread. Been busy with other garage projects and work. Lets see if I can get this back up to date.
As you may remember I had just finished the engine and got the bike into the garage for stripping. Although I had spent weeks spraying all the fasteners with PlusGas, I was surprised at how easily it came apart. I have long suspected that this bike was a loosely built collection of parts that don't really belong together and this carries on the idea.
The forks are looking like a bit of a challenge so thought I would start there. Although it's all a mess it appears that everything is there and correct.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
Not much evidence that these forks have been apart in the last half century so am expecting fun and games. I have a two prong tool for removing the seal holders from the rebuild of the 350F so that should be okay. First job is to get rid on the rancid fork oil and strip the stanchions out of the yokes.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
It all put up the usual fight but came apart okay. So just the simple task of dismantling the fork legs and have a look what lies inside. I'm not expecting the internals to be too bad as they have had oil in them all this time.
[ Guests cannot view attachments ]
The fork legs are looking a bit gone so maybe a trip to Philpotts coming on there.
royhall:
Still on the forks, just getting ready for the fork leg strip down. Everything so far looks present and correct although in desperate need of a little TLC.
[ Guests cannot view attachments ]
Well, I think I spoke too soon. Just whip off the seal holders with the two prong tool, not a chance. I got them in the vice and gave it plenty and they won't budge. I tried loads of heat from the blowlamp and still they won't give up. Tried an extension bar on the tool and the tool gave up. Going to have to come up with something homemade to get these sods to shift. After an hour or two in the garage I have come up with a tool suggested by Ash.
[ Guests cannot view attachments ]
If that doesn't shift the little blighters I really don't know what will.
[ Guests cannot view attachments ]
I had to have a rethink on the screws in the tool. Although it was now located on all four of the attachment points the force required just bent the screws. So I made some better screws and decided to try a bit of a trick. I repeatedly heated the part with the blowlamp and quickly quenched it in water. I did that several times and Bingo off they came. Unfortunately during the wrestling match one seal holder ended up damaged.
The rest of the forks came apart easily with the internals all being in good condition and okay to re-use. Unfortunately I cant say the same for one of the stanchions. I'm not really sure how it managed to get that rusty, but it is way beyond saving.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
Once again Ash came through with some replacement bits and kept the project on track. Thanks Ash.
royhall:
Had a look at Philpotts for the hard chroming on the fork legs. Although it's not just a straight centerless grinding job as there are various diameters and angles on them, Philpotts seemed a bit pricey to me. I ended up going to a company in Sandbach Cheshire called Dynasurf who quoted me £145 plus P&P. That more like it. I don't know if Dynasurf have any affiliations with Philpotts as their website 'About Us' is exactly the same as Philpotts, probably just plagiarism (had to check the spelling for that). Anyway, I shall report back on the quality of the job when they return.
For now some shiny bits have returned. As a reminder the wheels looked like this. In the end every part of this entire wheel was scrap.
[ Guests cannot view attachments ]
After a good look at the rims it was decided that the rust was in places so deep that they were scrap. Shame really as the rear rim was the correct DID item with the stamping on the inner of the rim. These have not been available for ages. The front rim is a pattern part that was also the wrong size, so that can go in the bin. After a fruitless search I decided to go with new K1 rims from CMS although these are DID they have the stamping on the side of the rim. Strangely the front and rear rims are the same size.
Although I decided to go with polished stainless spokes, I didn't really want the alloy polishing to a mirror finish as that was not how Honda sent them out in 1967. As a lover of bling that was a really difficult decision for me as instinct makes me polish everything to within an inch of it's life. But I was talked into leaving them a bit dull so I hope it turns out okay. The wheels went to Alan @ Southport Wheelbuilders and this is what came back.
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
[ Guests cannot view attachments ]
I'm very pleased with the way they turned out. After a good clean the replacement rear hub actually doesn't look like it has any cracks, so job done. I decided to again go with the Avon Roadrider 2 tyres mainly due to having the same tyres on all my other classics and I have got to liking them. I fitted 90/90-18 on the front and 100/90-18 on the rear.
The front hub was the original that was on the bike. Except for the brake plates that front hub is the only part retained from both wheels, all the rest was scrap.
[ Guests cannot view attachments ]
More soon I hope.
SPR:
Those wheels look excellent !
AshimotoK0:
Looking good Roy .. the rear hub seems to have turned out OK ... I reckon most Bombers out there will have some degree of cracking of that hub.
Funnily enough I have been rebuilding my Bomber forks (& CB72 ones) during the lockdown.
My whole bike was literally a ton of parts mixed up with CB250 and CB77 parts found in a garden in loads of plastic containers. Any chance you can do me a close up shot of the fork top bolts and the rubber parts of the forks .. I now know where the two chromed discs go, as I wasn't sure if they were CB72 or Bomber !!! Pretty sure I have everything but it was an absolute jigsaw puzzle nightmare piecing everthing together.
The top bolts are lised as a CB72 part ---268--- in my parts book but I have seen ---283--- parts listed on eBay .. so not sure what the difference is .. so if you could let me have the top nut hex size that will be great. Also can you check if the handlebar holders are chromed or polished alloy please?
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version