Finally got around to cleaning the valves on the Honda CL 360. While I hoped it would go just like the piston heads, the carbon build-up on these valves was thick, and the valves themselves are awkward to clean. I soaked them in Mineral Spirits, hoping to loosen the carbon, but that didn’t seem to do much. So I went at them with a brass wire brush, and some Simple Green. That helped a bit, but it took a lot more elbow grease than cleaning product, to finally get the build-up off the damn things.
When I got down under the carbon, I noticed some other type of crap on the exhaust side valves. Nervous that I was removing some layer that was supposed to remain on there, I stopped. Posted a question on SOHC forum, and the responses seemed to indicate that it may be Lead build-up from the 70′s gas! Good grief!
This has been one of the most tedious, and thankless jobs of a rebuild I have done. The amount of time I have spent scraping and scrubbing these things is ridiculous. Hoping to find a better process, since it feels as if all the momentum is stalled, and I am anxious to move on to more exciting things.
I know this all part of the process, and that I should be more patient. But man! This is one hell of a boring part of rebuilding a vintage motorcycle…