SOHC.co.uk Forums > CB350/400
'77 CB400F - it runs!
Nurse Julie:
Nigels method and your result proves there is a little movement but it does not prove if the chain is beyond spec, or if the horse shoe has minimal movement before it seizes.
mattsz:
--- Quote from: Nurse Julie on August 31, 2020, 08:02:47 PM ---Nigels method and your result proves there is a little movement but it does not prove if the chain is beyond spec, or if the horse shoe has minimal movement before it seizes.
--- End quote ---
True. I was hoping to hear from Nigel about whether he thought the amount of movement I discovered was ok or not. No matter now... my attempts at Bryanj's adjustment method didn't have a satisfactory result, and I just tried Honda's simple "idle the engine and loosen the adjustment bolt" technique which didn't change anything.
Worth trying to adjust the tension by removing the upper bolt and pushing on the plunger by hand?
mattsz:
When I ran it again just now, it still started and ran well, but I had some steady whitish smoke out the exhaust this time... and a surprising amount of water dripping out of the joint between the silencer and header collector - no wonder they rust out!
Should I not take it out on the road with that rattle?
Nurse Julie:
You will get condensation unless you ride the bike and get it hot enough to dry the steam out. My personal view, others may disagree, I wouldn't ride the bike with the chain rattling like that. Others may take a risk at a ride up the road but whether you choose to or not, that chain and adjuster need replacing.
mattsz:
--- Quote from: Nurse Julie on August 31, 2020, 08:36:26 PM ---You will get condensation unless you ride the bike and get it hot enough to dry the steam out. My personal view, others may disagree, I wouldn't ride the bike with the chain rattling like that. Others may take a risk at a ride up the road but whether you choose to or not, that chain and adjuster need replacing.
--- End quote ---
Understood. By way of investigation, I'm tempted to try manually adjusting the tension by accessing the pushrod through the opening just above the proper adjustment bolts. If I do, can I try it with the engine running, or will removing that upper bolt spray oil out? It looks to me like that's open to the unpressurized crank case, so oil shouldn't be a concern...
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