Oil Change Time!

[Jambo_imp]

LOL not hardly.

Wonder if anyone's mind and methods have been changed

Probably not. Forgot to mention that I used Honda oil filters at every change.

I do not want to dampen Jambo's enthusiasm (although a Reader's Digest version would be easier to follow) but bypass valves have two purposes:

1. Already mentioned by Jambo, to allow oil flow to continue if the filter media becomes clogged.

2. To allow cold, relatively thick oil to flow upon cold starts. Without a bypass valve, oil flow could be reduced/impeded upon cold startup.

Probably not. Forgot to mention that I used Honda oil filters at every change.

I do not want to dampen Jambo's enthusiasm (although a Reader's Digest version would be easier to follow) but bypass valves have two purposes:

1. Already mentioned by Jambo, to allow oil flow to continue if the filter media becomes clogged.

2. To allow cold, relatively thick oil to flow upon cold starts. Without a bypass valve, oil flow could be reduced/impeded upon cold startup.
One good thing about synthetic oil is even after you turn the motor off and let it sit an extended period of time, it will leave behind a film (dino too) of lubrication that should help limit wear on engine components. Some say, and it makes sense to me, that the first couple minutes of run time on a started motor can represent most of the wear accumulated, but also heat cycles and how long the motor is run. Most engines nowadays specify very low viscosity oils. The CB1100 says 10W30, but my Honda cars now spec 0W20. The first number relates to the viscosity when cold. Cold is a relative term. Maybe there are riders who brave subzero temperatures on occasions, but bet they're in the minority. Most riders aren't even going to start their bikes unless the bike is at least 40F (4.4C) and more likely still, at least 50F (10C). At those temperatures you are not going to notice much of a change in viscosity over 72F (22.2C).
"The number preceding the “W” (winter) rates the oil’s flow (viscosity) at zero degrees Fahrenheit (-17.8 degrees Celsius)."
The second number is the viscosity at 100C (boiling point of water).
If the temperature scale we care about is -17.8C to 100C, which is 117.8C, then the difference between 50C and 72C is 22/117.8 is about a 19% change in temperature (and viscosity?). If that is a linear scale, then your 10W winter rating at -17.8C will look like 19W oil at 40C. Will the bypass kick in at 19W viscosity oil? I don't know, but doubt it.
Will a bypass kick in with the oil at 10W viscosity at -17.8C/0F? I don't know.
Will you start your engine at 0F?