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1975 400/4 project
Sprocket:
Have received the cases and barrels back from the engineers. Front mount drilled out with a long drill. Cam adjuster repair kit fitted (front case needed machining a bit to get the internals to line up properly). Barrels measured and would you believe were still within tolerance for a standard set of pistons. The guys told me I could probably put the originals back in with a new set of rings if I wanted, but they always recommend new ones on historic rebuilds like this. The grooves were just over tolerance on pistons 1 & 4. Anyhoo, ordered a full set of standard ones from cruzinimage after some research and will see how I get on.
Slight pause in proceedings now while I wait for a power supply for my zinc plating kit. Silly me thought my battery charger could be fooled into powering it. Didn't check until I'd acid stripped all the bolts for the oil pump, so even though Julie got me a set of O rings super quick (thanks again!!) it's gonna be a week or so before I can refurb it.
Have a set of gears from a 14k mile bike too, from USA. They look a great deal sharper than the ones that came out, so that's a good sign too. Oh, and I also got a horn from a CL360 which comes with the same cover and bracket. Shipping was astronomical but the part itself was about $9. Still no idea if it works yet though, the bike is up tight against the wall now while I concentrate on the engine.
Sprocket:
Quick update, I haven't stopped working on it!
Cleaning, cleaning and cleaning has finally meant I can't find any traces of dirt on a clean cloth when I touch any part of the cases, inside, outside, oil galleries etc. Some of those 90 degree bends inside are almost impossible to get to, but many cable ties and a couple clothes hangers put their lives to the cause!
Have decided to get all new bearing shells, a couple might have been able to be cleaned, but I figured I may as well get it all sorted once, rather than pull it apart again in future. An eye-watering £218 to Long John Silver in exchange for 18 bits of curved metal... :-X
Crank is pretty much assembled now, torqued up the big ends slowly, then again the following day and a satisfying teeny blob of green paint on each nut. The little things that provide satisfaction!
The gear clusters I got from America have been knobbled. In the countershaft one of the oil plugs was missing, the other punched through with a screwdriver. Although the old one I had was complete, I had no way of getting them out. So I went to see the friendly engineers and am waiting for them to turn down some brass to fit. While I was there they did mention they look like 11mm core plugs (which I have spotted online for a few quid) but I feel like getting something engineered to fit properly is the safest bet.
Spent some time measuring up the piston rings in the kit I received from Cruzinimage. All within spec, nothing needed filing back at all. Managed to bust a black ring assembling one of the pistons though. Top marks for customer service from the seller though, I explained I did it and they came back with a pretty reasonable price for a replacement set (2 rings and a 3 piece oil control set).
Jury is still out on what to use to bond the cases back together. Hondabond, Yamabond, Threebond, Toothpaste, Silicon Sealer, Sand & Cement, etc... Answers on a postcard please...
Laverda Dave:
Keep going 👍. Post some progress photos if you can. I use Honda bond for the cases.
K2-K6:
"Jury is still out on what to use to bond the cases back together. Hondabond, Yamabond, Threebond, Toothpaste, Silicon Sealer, Sand & Cement, etc... Answers on a postcard please..."
I've seen a few that look like they've been assembled with sand and cement ;D but you may need planning permission for that ;D ;D
It's a nice step when you get everything clean and ready to go together, sounds like good progress.
Nurse Julie:
Hondabond. But, I think any of them, yambond, suzukibond etc are all Threebond just in different tubes. Avoid white bathroom sealant, it makes such a mess 😀😀😁😀
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