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Discussion Starter #1


So, not too bad. I do remember coming back to my bike after parking it for a few hours and a puddle of gas was on the floor below it. Apparently I didn't shut the fuel petcock to closed *all* the way, only most of the way.

Why is it so easy for gas to get into the oil?
 

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The float valves (needles) do not provide a perfect seal. When the petcock is left on it's common for fuel to seep past which can lead to fuel overflowing through the intake, past the rings, and into the crankcase.
 

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It's probably why new bikes have fuel pumps and vacuum petcocks.

I wish it were less than 30$ a test, it would be interesting to see if synthetic oil lasts longer than the recommended oil change interval (which is based on 1980s conventional oil tech)
 

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On your model the carb is higher than the floor of the intake port. If there's any high fuel level for any reason then the fuel will flow downhill into the engine.
 

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Discussion Starter #5
It's probably why new bikes have fuel pumps and vacuum petcocks.

I wish it were less than 30$ a test, it would be interesting to see if synthetic oil lasts longer than the recommended oil change interval (which is based on 1980s conventional oil tech)
It is less than $30! It's $28 ;)
 
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