The idea of routing air from the air cleaner was to reduce vacuum at the valve guide which it (vacuum that is) was though would lead to oil being drawin into the cylinder and burnt.
We can only guess whether it didn't really work or whether Honda just decided it was too expensive a fix to a problem that didn't really exist. They didn't come up with an alternative like fitting seals to the valve guides as far as I know.
G
Jims65CA77 wrote:Thanks G-Man! What I meant by "Better" is the performance as Honda originally intended for the engine. However, it sounds like that isn't really an issue whether they are blocked off or fed into the air filter. I suppose Honda thought it was a good idea at the time but later realized... it was not really that important after all.
The air filter (original one) on my CA77 has 2 HOLES (factory looking) in it and I assume that is where the two hoses would go. My bike still had the hoses on it, although they were just laying on the engine and looked as if they were a drain; so to speak. FOR YEARS I had wondered what those same "barbs" on the heads were for on my '65 CB160!
THANKS!!! another "mystery" solved! ;^)