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-Tearing down my CB350K0 for a rebuild of the engine (cylinders-up only, as it only has 4,000 miles). The engine developed a high-pitched squealing sound between 3000-5000 RPMs. Sounded like maybe coming from cluth, but upon disassembly everything was good there (still replacing the plates with carbon though). Checked the rockers and valves and those were good as well-no excess movement and all clearances good (although did need some de-coking). My only thought is it might be the drive (small) sprocket coming from the transmission. The sprocket is fairly loose and wobbles. This is my first CB350, so I don't know if that's normal. I'm used to British bikes and those never have had drive sprockets that wobble like that. Could that be what's causing the squealing from 3K-5K rpm's? Anyone have similar experience and have ideas on what I should check?

Thanks, all!
 

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The counter sprocket is supposed to be loose and wobbly, sort of.
Same on most of these old Hondas.

Someone smarter than me could probably explain why........
 
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