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New (to me!) '77 CB400F - US model
mattsz:
Regarding the clutch...
It seemed to work fine three years ago when I rode it last, but now it's become extremely difficult to pull. I won't hazard a numerical guess about the actual force required, but it's not safe to ride in this condition. It can be fully pulled, and it does return on its own, albeit a bit sluggishly.
Aside from the obvious possibility of a binding cable, what else could be the trouble?
Might this be expected of a bike that's been sitting for a couple of years? In other words, should I be thinking about solving this problem before I try running it (whenever that turns out to be)? Or might it sort itself out with some oil circulation and exercise?
Bryanj:
Almost certainly cable and as a hint DO NOT oil an original cable as the onner is rubber coated and the outer nylon lined, oil tends to "swell" both and make the cable tight. Aftermarket cables may dispense with one or both of the linings and be safe to oil but i dont comment on that!!
mattsz:
--- Quote from: Bryanj on January 09, 2019, 02:37:29 PM ---Almost certainly cable and as a hint DO NOT oil an original cable as the onner is rubber coated and the outer nylon lined, oil tends to "swell" both and make the cable tight. Aftermarket cables may dispense with one or both of the linings and be safe to oil but i dont comment on that!!
--- End quote ---
Thanks for all you helpful advice bryanj!
mattsz:
I took a look at the fuel tank today. The interior looks to be pretty rust-free, but I can't see in very far... and I hear some fine particles rolling around inside when I twirl the tank about.
I removed the petcock and the fuel filter tube stayed in the tank, the gasket sealing it to the petcock was a bit chowdered. I made it worse pulling it out of the petcock nut. I was able to drag the filter out, revealing rust in the petcock mounting "tube." Still can't see inside the tank, though, to try to get a sense of what's going on in there. Pics below - the fine rusty-dusty particles fell from the filter when I tapped it on the table...
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I don't know if the petcock innards are in working condition... body is riveted, is there any hope of refurbishing this one, or should I just spring for a new one?
Bryanj:
What size is the tread on the tank, if 18mm i can help you.
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