SOHC.co.uk Forums > SOHC Singles & Twins
CB350 1971 Restoration Project
BenPowell:
Thanks guys for the response Re the headlight and paint, will probably get some this week, may give both a try and compare them.
Had a bit of time today and started stripping out some of the parts for blasting.
I’ve got the exhausts off and I’m having a bit of trouble separating the header tubes from the silencers. The silencers are unfortunately rotten and completely beyond repair but the headers are in good condition and should clean up well. Wondering what the best way to attack it is without damaging the header tubes?
While I’m on the subject of chrome bits, what’s the best way to clean up and polish, I have used some autosol on the handle bars with good results, but always like to try new products and methods.
Thanks again everyone, picture below of the bike after tinkering today.
AshimotoK0:
Ben's my work colleague (there are queues now for bead blaster now as another young chap where we work has bought a Motobecane moped).
You need to completely unscrew the exhaust clamps as they have a folded over part, which goes over a ring, which is welded to the down-pipe. From memory the bolts don't completely unscrew because the end is peened over. There is an insulating bush/sleeve between the pipe and the silencer and it can bond to the pipe/silencer with age and a bit hard to remove. I don't think the David Silver (made by Brituro) pattern silencers use the insulating sleeve though. The CB250/350K exhausts as spare parts were always sold as a complete unit and never as a separate down-pipe and silencer. The rare 1968/early '69 bikes had a 'one piece' welded together silencer and down-pipe with no model stampings . Your K3 woud have had HM317's. It's taken me nigh on 10 years to get my hands on a decent set of 'one-piece' pipes.
You are on the right lines with Solvol to clean up the chrome. Best to fetch your downpipes and other chrome to work for me to assess.
Took the liberty of rotating and cropping your pic. So nice to have young blood getting into classic Honda's :)
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BenPowell:
One of them looks like it has been bodged a bit, but the silencer is loose, the one which hasn’t been bodged is well stuck, I’m on the right track because I removed the bracket and could see where it was folded over but could not get it to break free, will have another go at it one night this week.
I have the rear mudguard in my car so you can have a look at that tomorrow, along with some other bits, got the carbs off as well. (Something else which is stuck ::) )
Really enjoyed working on the bike so far, they are really well thought out in terms of being easy to disassemble.
K2-K6:
I use this for gentle cleaning of many surfaces
https://www.ebay.co.uk/itm/383374463898?chn=ps&norover=1&mkevt=1&mkrid=710-134428-41853-0&mkcid=2&itemid=383374463898&targetid=1139674279667&device=t&mktype=pla&googleloc=9045909&poi=&campaignid=12126078234&mkgroupid=117237237815&rlsatarget=pla-1139674279667&abcId=9300480&merchantid=113482233&gclid=EAIaIQobChMIgb_g2ZLP8AIVtRoGAB2weADWEAQYBiABEgKO_fD_BwE
You'd need to try it on anything sensitive but it's really a very fine cleaner that can be useful.
Laverda Dave:
Good work Ben. Hope you are enjoying the strip down. The rebuild is the best part of a restoration, everything is clean and like new!
A tip I was given by a chromer when he was unable to re-chrome the Z400J Kawasaki parts was to rub them down using fine grade wire wool soaked in plenty of WD40. Wipe clean with a rag and then use Solvol. Once that is polished off go over the parts again with wax car polish, when dry rub with a clean cloth to polish. It really does work and saved me a fortune on re-chroming parts that were salvageable 👍.
Keep posting progress reports, it's a good read🍺
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