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Reveeen · 07-12-2009, 01:09 PM

The only thing I have to note about that 350 series of Honda bike is:

WATCH THE OIL.
Even within "range" on the oil stick, the first thing to oil starve is the overhead camshaft, I have, over the years, repaired over 100 that "ate" chamshaft, followers, andÂbearings. Keep the oil level to the "full" mark.

The cam chain guides, and adjuster, are some sort of plastic. Plastic that gets VERY brittle with age. I can only guess at the expected life of these parts (it would depend on the number of heating/cooling cycles) BUT if I expected to get anywhere near the red line (lowered in 1974) I would call it a service part every 5 years MINIMUM. I bought/took apart a low mileage example (CB350), maybe 6,000 miles, @10 years, and the timing chain stuff was bad, real bad.
I would expect catastrophic failure (on a par with a Honda 450 twin) if any of this stuff let go.

07-12-2009, 01:09 PM	#4
Reveeen Join Date: Jun 2009 Location: orbital platform Posts: 741	The only thing I have to note about that 350 series of Honda bike is: WATCH THE OIL. Even within "range" on the oil stick, the first thing to oil starve is the overhead camshaft, I have, over the years, repaired over 100 that "ate" chamshaft, followers, andÂbearings. Keep the oil level to the "full" mark. The cam chain guides, and adjuster, are some sort of plastic. Plastic that gets VERY brittle with age. I can only guess at the expected life of these parts (it would depend on the number of heating/cooling cycles) BUT if I expected to get anywhere near the red line (lowered in 1974) I would call it a service part every 5 years MINIMUM. I bought/took apart a low mileage example (CB350), maybe 6,000 miles, @10 years, and the timing chain stuff was bad, real bad. I would expect catastrophic failure (on a par with a Honda 450 twin) if any of this stuff let go.
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