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Smoke at high RPM

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Athame57:
Discussing an oil leak on CB400F2 with someone oop Blackheath today and I revved the engine up to the red line a few times in neutral, which I hardly ever do. It produced grey smoke so it must be burning some oil off, but I can't say anything actually sounds bad...your thoughts?

Laverda Dave:
When I was lucky enough to have studied motor engineering at my local comp school (in the 70`s!) I was always taught to never run an engine up to maximum revs with no load on it as that's when things can break in a big way. Admittedly this was back in the days of big tolerance engines but then again a 400/4 goes back to that period.

Trigger:

--- Quote from: Laverda120 on August 30, 2019, 09:08:26 PM ---When I was lucky enough to have studied motor engineering at my local comp school (in the 70`s!) I was always taught to never run an engine up to maximum revs with no load on it as that's when things can break in a big way. Admittedly this was back in the days of big tolerance engines but then again a 400/4 goes back to that period.

--- End quote ---

Yep, that is the easiest way to bend and throw a rod  ;)

Athame57:

--- Quote from: Trigger on August 30, 2019, 09:53:09 PM ---
--- Quote from: Laverda120 on August 30, 2019, 09:08:26 PM ---When I was lucky enough to have studied motor engineering at my local comp school (in the 70`s!) I was always taught to never run an engine up to maximum revs with no load on it as that's when things can break in a big way. Admittedly this was back in the days of big tolerance engines but then again a 400/4 goes back to that period.

--- End quote ---

Yep, that is the easiest way to bend and throw a rod  ;)

--- End quote ---
I know...I know! With this bike it was a first for someone who begged to for the camera!

Athame57:
...what I really want to know though is what does the smoke mean...is she ill?

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