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Messages - magpie114

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91
Project Board / Re: Project CB350F
« on: October 25, 2023, 11:03:23 AM »
Thanks Ian for the information, its a big help. I like your rig setup and will use it as a model. I'm sure I can recover the oil filter housing but thanks for your offer.

Thinking about it you are probably right about the rebore. I've been busy labelling and bagging parts but I made a few quick measurements as a guide. I don't have any means to measure the bores but the pistons and ring gaps are within service limits. I'll measure them accurately when I've cleaned the pistons up properly. I'm not sure how of the best way to remove the surface rust film/glaze tho'.


92
Project Board / Project CB350F
« on: October 24, 2023, 09:09:13 PM »
Despite stating in my new member intro thread that I was looking for a 750 to restore, I’ve ended up getting a CB350F (American import) instead. There was a post about it on this forum
http://www.sohc.co.uk/index.php/topic,29772.0.html

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Its obviously been stood for a long time and there’s a lot of surface rust but everything is solid. The tank has a couple of shallow dents but looks good internally. The mudguards have fine pitting but are free of dents and should be ok for stripping and replating. I was surprised to find the owners manual under the seat, unfortunately without its cover (I get the impression the manuals are rare and I’ve scanned it if anyone wants a copy). The first thing I noticed when sitting on it was the relatively high bars. My VFR400 is too low but this is very upright for me and it seems the bars fitted to the European model are a little lower? Anyway that’s some way off yet. The pipes are not going back on!

The frame and other parts have gone for powder coating today and and I’ve made a start on the engine. The pistons have a lot of carbon deposits. The exhaust valve in cylinder 4 was very slightly stuck open and the top ring in cylinder 3 had seized in the piston.

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A couple of the bores have very slight rusting in places - photo actually makes it look worse than it is. There was nothing worrying in the sump.

The only problem I’ve had so far during disassembly was the oil filter bolt, ridiculously overtightened. The bolt already had slightly rounded edges and would not move. Eventually ended up rounding the bolt head. I drilled thro the head and tried using my largest stud extractor but gave up at the point where I was convinced it would snap. The only remaining option then was to drill with a 20mm bit to remove the head and part of the flange. This allowed me to withdraw the housing and unscrew the remainder of the bolt. Unfortunately I caught the housing which will now need remedial work.

Reading Nurse Julie’s and Royhall’s build threads has been great preparation for splitting the cases hopefully this week. No doubt as well as a rebore and pistons, some big end and main bearing shells will be needed. I’d welcome any advice as to which ones I can reuse.

Alan

93
CB750 / Re: Painting of Tank and Side Panels of my 1976 Honda CB750 K6
« on: October 18, 2023, 09:41:04 AM »
Hello Keith
Rapier Paintwork in Hull are fairly close to you. They did an excellent job some years ago on my VFR400.
Alan

94
New Member Introductions / Hello from Scotland
« on: July 02, 2023, 05:12:47 PM »
Hello all. Hope to be active in the forum later this year. I’m retired and will be looking for a CB750 to restore once I’ve sold my Bandit and VFR750. I still have fond memories of a K2 I owned which seems a lifetime ago now.
In the meantime I’ll be mostly hanging around to find my way around and pick up some of tips.
My previous restoration, a VFR400 NC24 wrecks my wrists, but its definitely a keeper.

Alan

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