Start over - Opinion please?

[Skyguy]

This is a do-over the previous 2 posts below, ("Spark units & A little help".)

Starting fresh with info: ALL 6 cylinders are hesitating / bog / cough at 4000 RPM. & will not increase RPM beyond that.

The Pipemasters exhaust pipes are not true 6 into 1 but the timing light confirms all 6 rough at 4000 RPM

*Beware, the video will make you pucker in angst at the CBX trying to rev past 4000 RPM.

VIDEO:

https://www.youtube.com/watch?v=GR0TQqk ... e=youtu.be


What could possibly cause all 6 to run rough at 4000 RPM???

- Timing light confirms all 6 are barking, hesitating with timing light on pulser rotor.

-Choke confirmed working both directions.

- All compression checks good, same issue

-Battery checks good with switching from a known good other battery, same issue

-Air filter not bad, ran without -same issue.

-All plugs checked and not wet or white, just about right. same issue

-All 3 coils checked at 3 + OHM's. same issue

-Cleaned, inspected, plug wires -same issue

- Grounds on wire harness -good, same issue

- replaced pulser with used but better looking one from Ebay, same issue

- Did a temp gun check on all six headers, same consistent temp across the board, (I know the temp gun is not accurate on chrome but consistency is key)

-Mechanical advancer "Appears to function."

- have not even looked at the Spark units, (*AKA: electrical slime bogs.) *But usually if one is bad only 2 cylinders affected.


Anyone care to chime in? All opinions, guesses, furrowed brows are welcome!


Sky

[daves79x]

Sounds like it's not getting fuel. S'pose you already checked fuel flow everywhere, bowls filling, etc?

Dave

[Skyguy]

When you think it's fuel, it's electrical. When you think it's electrical, it's fuel.


It was 3 clogged jets. 2 primary, 1 secondary.


Nothing to see here citizens, time to move along now. Bike runs fine.

[steve murdoch icoa #5322]

Not surprisingly, well diagnosed, Dave.
Glad you got it sorted, Skyguy.