Loss of power when passing

It should be around 14 to 14.5v. But 13 is more than enough to run at least for awhile.

Since it came on suddenly, I would first check the advancer to make sure it moves freely.

I would check the spark plug gaps, not that that alone would cause it, but weak coils or bad plug wires will get exacerbated by large plug gaps.

Also, if you added a see-through fuel filter for cars, that can cause a fuel starvation under certain conditions.

Would do a petcock fuel flow test as well.

If there is a way to check voltage at the coils while passing, I'd check that somehow if the other things don't pan out. You may have a flakey connection somewhere in the ignition circuit that only happens during high-vibration times like when passing.

There are probably quite a few other things to check.

Condition of air filter?

Could do a test ride without the air filter.

Good Fortune!

It is a strong stumble throws me forward like I got rear ended The fuel filter is the first thing I checked the coils are not hot to the touch after running it today. I did just recently check the advance like a month ago for a unrelated comedic issue and since I was in there I greased the slide. I will try without the air filter

[quote="ahot1968" post=745651. . . I greased the slide. . . .[/quote]

Grease on a carb slide could cause it to stick and not be able to easily move up and down as it's supposed to.

Good Fortune!

It is the oil filed air filer I have almost a quart of oil in my air box how is that even possible?

ahot1968 wrote: It is the oil filed air filer I have almost a quart of oil in my air box how is that even possible?

What type air filter is it (paper pleated, oiled foam, K&N)?

Good Fortune!

The airbox is supposed to have a drain hole.
Perhaps it's stopped up?

Good Fortune!

If there's a tube from the oil breather into the airbox, an over-filled crankcase could have resulted in oil being expelled into the airbox.

Another idea --- does the crankcase oil smell like gasoline, or otherwise appear to have become diluted with gasoline?
Level of oil plus gasoline in the crankcase could rise high enough to expel into the airbox, where the gasoline evaporates away leaving a mostly oil residue remaining in the airbox.

There are several conditions under which gasoline may intrude into the crankcase.

Good Fortune!

If excessive oil is pumping into the airbox from the crankcase, and the oil level is at the right height, it could mean a broken ring. Do a compression test to see if any cylinders are down on compression.

Broken ring(s) or not, I can't imagine a quart of oil getting into the air box unless air cleaner has never been checked and the bike was overfilled with 5 quarts of oil.

This is a lot of oil the drip hole is a little clogged but still dripping but no way could that small hole keep up with all this oil the breather on the top of the transmission must be pushing the oil up there. Why so much though there must be a underlying issue. when I say a lot of oil in the air box I mean it is more than 3/8" level in the box when on the center stand and dripping out the small drain ever so light. I stuck a nail to clear it and the flow is better but then went for a ride and it is almost as full again. Good news performance is back no more bogging since I trashed the oil soaked air filter. But I will not put a new one in a pool of oil. I need to stop the upward flow of oil.

Too much blow by means a top end job is due. :dry:
Steve