Author Topic: 1971 CB500K0 Resto 3/71 VIN 1000896  (Read 34427 times)

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #15 on: December 01, 2015, 08:31:12 PM »
Looks like you're giving that bead blaster a good workout ash!! Nice progress.

Yea I just love bead blasting   :-*  I find  it really  therapeutic ... I have blasted the hell out of 50/100 glass beads and it takes a while to strip but the finish is mega fine. 
Wife just got back from overnight stay in London with my daughter   .. "Hope you wasn't bored last night without us" ... think you all know what the answer was that I muttered under my breath  ;D ;D
« Last Edit: December 01, 2015, 08:33:12 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline matthewmosse

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #16 on: December 01, 2015, 09:56:33 PM »
I now do shot blasting at work and we are having issues with both the rough finish the metal shot leaves and the reclaim system not being up to recovering the metal shot afterwards. What exactly is the blast media you are using, would it be re useable and is it costly and would it cope with removing rust and scale? I am wondering if we need to investigate different products a bit, to my mind a rough finish is ok on industrial kit and working fast is kind of vital for us but I am wondering if the bead blasting might answer their requirement for a finer finish, it looks like it could be almost used to just get a keyed finish on powdercoat rather than go back to bare steel. A lot of what I end up doing is just sanding stuff to get a key.
Got a 500/4 with rust and a sidecar and loadsa bits. nice and original and been round the clock

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #17 on: December 02, 2015, 12:14:39 AM »
Hi Matt  ...I use this ... scroll down to 50/100 grade "Vixosheen"

http://www.ebay.co.uk/itm/Vixen-Vixosheen-Glass-Bead-Media-25kg-Blasting-Shot-Sand-Grit-Abrasive-/321928939735

Pic of the cabinet (Vixen) attached. The extraction/media recovery system works well on it.

It definitely removes rust but not the best grade/media for thick paint but paint on frame parts (like footpegs etc) comes off great with it.

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« Last Edit: December 02, 2015, 12:17:08 AM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline UK Pete

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #18 on: December 02, 2015, 06:40:14 AM »
Thats a good piece of kit to have use of ash
pete

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #19 on: December 02, 2015, 08:17:45 AM »
Yea Pete .. Like I said to James when I met him, I work now 3 days/week for a mate of mines company (I still have my own electronics design business though) . As a joke really, my mate, the owner  called me in at  'Staff Appraisal' time, which was just a load of jokes and banter really. He asked me what was the best reason for joining the company and he was surprised by the answer, which was  " By a mile ...  the access to use of the bead blaster"  ;D ... He was expecting something more corporate and deeper meaning I think. Myself and another guy who's building a CX500 cafe racer conned him into buying the blast cabinet after we got flooded. I think it's done about 2 hours blasting for the purpose it was supposedly bought for  ;D.

BTW you may remember I came up with a brew (caustic soda/EDTA and Trietholamine) for removing zinc plate ) .. well I pinched the slow cooker out of the loft (unused for about 25 years) to heat the 'brew' with ... Hence no invites to any of you for a casserole at my place... Well I bought the wife a new one from Aldi for 12.99 at the weekend   .. Worth buying for rubber soffening /de-plating zinc etc for that money.  Oh and you are safe to eat at my house again if you ever visit  ;)
« Last Edit: December 02, 2015, 08:24:36 AM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Johnwebley

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #20 on: December 02, 2015, 10:41:47 AM »
thanks Ash,

 I really enjoy your threads,

 but this post made me chuckle,

 keep up the good (brilliant) work and words !!
lifelong motorcycle rider,and fan

Offline matthewmosse

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #21 on: December 02, 2015, 09:16:27 PM »
Thanks for the info, will add it to the miniscule bit of knowledge I have scraped together so far. Had a different set of issues with the blasting kit today. The kit we have at work is a bit more industrial then that - kind of a steel lined room 6 by 10 metres and 4 high, with a 8 foot monster of a reclaim unit outside connected to a hopper built into the floor, the issue with it is getting the reclaim unit to suck 250 kilo of steel shot out of the hopper, it struggles a bit but I think I have figured it out now, issue being it needs just the right ammount of airflow down between the walls of a twin wall pipe and up the suction hose that is the inner pipe. Now the damp weather means just as I resolved that the shot in the blast pot is caking up thanks to moisture getting in there in this damp weather. I wish I could bring my projects into work to do at lunchtimes, but I doubt I would still have a job if I did. I would love to get a shot blaster at some point, gets the job done so much better and faster.
Got a 500/4 with rust and a sidecar and loadsa bits. nice and original and been round the clock

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #22 on: December 03, 2015, 02:41:39 PM »
Ha ha expert indeed. No-one really knows. I have vin # 2064 which has the same crankcase design. When I listed ash's bike on eBay earlier in the year someone dropped me a line and told me it was rare and that I should double the asking price. Gut feel is that they changed the design after ~2500 were produced...anyone here have a vin in the 2500-3000 range?

got this back from someone on the USA site:

"Oh, yes I didn't notice that, now I see what you mean!

None of my three 21's have that squared of bit at the front. (2141XXX, 2153XXX, 2156XXX)

John"
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline SteveD CB500K0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #23 on: December 03, 2015, 04:00:56 PM »
... presumably because his "21s" are all K2s ...   :)

2015 Tiger 800 XRT
1971 CB500K0

Offline Jamesh_sussex

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #24 on: December 03, 2015, 04:11:40 PM »
This is definitely an early 500 k0 feature. I have VIN 1015771 and 1047327 (both K0's) and both have the later rounded case design.

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #25 on: December 05, 2015, 03:39:34 PM »
Had a bit of a blast last night after work. rear hub looks fine. Not even attempted to move the retainer yet until I have made a tool for it. Is is LH thread? It is made of steel, are they supposed to be alloy?
header pipes double skinned must be originals chopped from standard pipes (you can see the spot weld in the pics). Going to strip down the electrical parts to re-plate.

Got the engine out. One lower bolt was not too stubborn but the other side I had to chop through the nut with a slitting disc/cold chisel. Not blasting the lower yoke, just going to repaint it.
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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #26 on: December 05, 2015, 03:42:13 PM »

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« Last Edit: December 05, 2015, 03:45:02 PM by AshimotoK0 »
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #27 on: December 06, 2015, 07:53:33 AM »
Just been investigating the black finish on the carb rubber clips and the top yoke 'D' spacers. At first wondered if it was 'Japanning' ..like you get on old screws and tacks but convinced it more likely to be black passivate, which I didn't know existed but Gateros plating do it. Problem is its £24 as compared with about a tenner for the blue/gold chromate passivate. Will ask the barrel platers if they can do me a few items, may be cheaper or get Gateros to supply me 1 litre instead of 5l as unlikely to ever use it again.

Can someone confirm that the 500K0's had black finish  clips originally please? The pic below is of a K2 not a K0.  the other pic is of the the ones I have (after bead blasting). Going to dunk them in my 'brew' in the slow-cooker today to remove any traces of zinc, corrosion. If they are indeed zinc plated I will see loads of bubbles, when I dunk 'em.

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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline AshimotoK0

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #28 on: December 06, 2015, 08:15:25 AM »
Forks are perfect in the chromed area no pitting whatsoever. Usual corrosion around bottom yoke clamp but I can deal with that. I masked the sliders from the bead blasting with 'gaffer' tape and I will use chemical stripper to try to retain the original finish before applying new clear coat.

MY ADVICE TO ANYONE IF JAMES H  IS SELLING A "PROJECT" BIKE...  GET IN THERE FAST AS BOTH BIKES I GOT FROM HIM ARE SPOT ON  ;D

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“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline Oddjob

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Re: 1971 CB500K0 Resto 3/71 VIN 1000896
« Reply #29 on: December 06, 2015, 10:44:37 PM »
As the stanchions are covered with the gaiters why not have them hard chromed by Philpotts, hopefully that may also cover the corrosion where they meet the yokes.
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