The International CBX Owners Association

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

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

Dave

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.

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