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CB350F Restoration by royhall (NOW FINISHED)
royhall:
Got the engine together over the weekend. Looks like two dowels are all that's required after all. Very pleased with the way it went. The engines had the full house: Main/big end shells, gearbox bearings, primary chain, cam chain, cush drive rubbers, pistons/re-bore, 2 valves, 2 rockers, all gaskets and seals etc.
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Used loads of graphite assembly paste on all the shells and cam gear. Used a bit of oil as well as I just couldn't stop old habits. Belts and braces so should be okay.
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Can you tell it was just Fathers Day!
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Was a bit nervous about getting the gear selection mechanism back correctly. Don't know why I worried, turned out to be the easiest part.
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New pistons and re-bore went together no problem. The rings appear much easier to get into the bores than on the 750. Remembered to give the oil control jets a really good clean this time. ::)
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So that's the engine back together, went much easier than I had imagined. The 350 appears to be a well built and thought out engine. Next challenge is getting it back in the frame. More soon.
royhall:
Decided to tackle getting the engine back into the frame. Should really have waited for my mate to give me a hand on Friday night. But sorry I cant, like an excited child on Christmas night. Had a bit of a think about how to do it myself, and this is how it went. Now I'm just off to get some back ache pills.
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Got the engine on it's side and chocked it up with a block of wood. Then lifted the frame over the engine on the bench.
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Levelled the frame up a bit and pushed the front footrest bolt into position. Bit of pushing and pulling got the two lower front bolts into place. Just slipped the nuts on to stop the bolts falling out, then stood the frame up on the bench. Note the 6 pan head screws in the sump fixing holes, this was to raise the engine slightly because the starter gear protrudes just below the casting and scrapes on the bench.
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One Herculean effort saw me single handed lifting it off the bench onto a piece of carpet on the floor.
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I rebuilt the 750 sat on an old bear crate with some 18mm ply and carpet on top. Unfortunately the 350 wouldn't work on it as the side stand bracket hangs down on the left. So out with the woodworking tools and a few modifications followed. The missus says I need to get that driveway redone. Cant see anything wrong with it myself.
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All now safe as houses and high enough off the floor to get the wheels on and make working on it a little easier. Got a second bear crate there for sitting on. All the perfect height. Am running out of reasons to buy crates of Warsteiner.
Need to find a painter now and get the bits off to them. Recently realised that I cant get the bike rolling on its wheels without the painting done first. Headlamp ears and fork shrouds will be holding the job up.
Still plenty of other stuff to be going on with.
Stay tuned for the next adventure.
Tiny Tim:
Looks fantastic Roy. Your putting my slow build to shame, not had a lot of spare time recently.
I realised the same problem with assembling a rolling chassis. Painting parts has jumped to the front of the queue.
Who did the rebore for you?
Cheers
Tim
royhall:
Your well on your way with it Tim, were just approaching the jobs in different directions. You'll be there soon (I know what you mean about time, I'm getting some flack for always being in the garage. Apparently I'm obsessed) ;D Gardening this weekend. :(
The re-bore was done by a small machine shop near where I live. The guys called David Burton, he's a real eccentric character but a superb engineer.
I get a fair few bits done by him. He re-ground the back disc on the 750 as it was a bit tram-lined, came back literally better than new for £40.
Cant just remember what he charged me for the re-bore (possibly £80 getting old ya know), but I know it was much less than another quote I had and the job he did was fantastic.
If you want to when your ready, you can post your bits to me and I can drop them in to him, its no problem as its only about 1/4 mile away.
Cheers Roy.
AshimotoK0:
--- Quote from: royhall on July 01, 2015, 10:14:01 PM ---Your well on your way with it Tim, were just approaching the jobs in different directions. You'll be there soon (I know what you mean about time, I'm getting some flack for always being in the garage. Apparently I'm obsessed) ;D Gardening this weekend. :(
The re-bore was done by a small machine shop near where I live. The guys called David Burton, he's a real eccentric character but a superb engineer.
I get a fair few bits done by him. He re-ground the back disc on the 750 as it was a bit tram-lined, came back literally better than new for £40.
Cant just remember what he charged me for the re-bore (possibly £80 getting old ya know), but I know it was much less than another quote I had and the job he did was fantastic.
If you want to when your ready, you can post your bits to me and I can drop them in to him, its no problem as its only about 1/4 mile away.
Cheers Roy.
--- End quote ---
Looking good Roy..
You have just answered mine and JamesH's question. How much is it to re-surface a CB 750 brake disc? The 750K0 disc is different than the later bikes. My bike had the later wheel hub/disc (K1-K6) so I bought a K0 front wheel complete with correct hub & 'rotor' (disc) from the States but it's surface is slightly scored. I also have the original K1-K6 disk (not badly scored) and a K7 one, (not badly scored) . What do you reckon I should eBay them for BIN ?
Can you also find out the re-bore costs, as I may have some barrels to do off a twin.
Cheers ... Ash
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