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New (to me!) '77 CB400F - US model
mattsz:
I'm reading some recent posts about cam chain tension and other engine specifics. Waaaaay back at the distant beginning of this thread, I posted an "engine run" video - it didn't garner any attention, which I'll assume is a good thing!
Anyone want to check it out again, with an ear towards whether there's anything that sounds amiss? Any red-flag rumbles or rattles or what have you? I know, a crappy video is a difficult diagnostic tool...
https://youtu.be/Szxke8bD_dg
Although I made that video almost exactly four years ago, the previous owner only put about 300 further miles on the bike before I got it, so it's likely still representative of the engine condition...
Nurse Julie:
Impossible to tell anything with it idling far too high. But, like you say, videos are difficult to hear anything on. It sounds like there is a rattle there somewhere, which would not be expected with the revs that high. Also, running quite poorly by the sounds of it, sounds like it needs a good service and basic maintenance before any real diagnostics can take place.
mattsz:
--- Quote from: Nurse Julie on July 19, 2019, 02:47:51 PM ---Impossible to tell anything with it idling far too high. But, like you say, videos are difficult to hear anything on. It sounds like there is a rattle there somewhere, which would not be expected with the revs that high. Also, running quite poorly by the sounds of it, sounds like it needs a good service and basic maintenance before any real diagnostics can take place.
--- End quote ---
Yes - it was running very poorly at that time - and probably would be now, too... ;D
mattsz:
--- Quote from: kent400 on June 25, 2019, 05:59:03 PM ---Well that side stand is too loose wrong bolt maybe securing it to the frame
--- End quote ---
Not sure if it's the wrong bolt, but I don't think so. The non-threaded portion of the bolt is an ever-so-slightly loose fit in the frame bracket - I think the problem is that the stand is bent. Observe how the outside tang splays out at the top, and the resulting gap where the bolt's head doesn't touch as a result:
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Evidence is stacking up that this thing was dropped on the left side, or in some kind of accident. The bent side-stand (although I would think the "inside" tang would be bent if the stand got pushed inwards somehow), and also the gear lever...
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... and the rear turn signal, of course...
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Bryanj:
The "Opening Up" of the slot is a fairly common thing to see but with that and wear on the frame lug you get too much "slop" I have before now carefully straightened the stand for and put a shim washer under the bolt head to keep it tighter.
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