Bike died, acts like fuel starvation but fuel in tank...

[bigfatcat]

Had this issue once.  Turned out to be the CDI Ignition box.

EVERYTHING and I mean everything said fuel starvation.  Not sure if this is the case for you or not...I doubt it is since you have nice spark.

I've seen this too, even having a good spark (tested with plugs grounded outside the engine), but after running on the street for an hour or more, or 5 minutes with another ignition box, symptoms of 'fuel starvation' appeared.

[canucklehead]

Had this issue once.  Turned out to be the CDI Ignition box.

EVERYTHING and I mean everything said fuel starvation.  Not sure if this is the case for you or not...I doubt it is since you have nice spark.

I've seen this too, even having a good spark (tested with plugs grounded outside the engine), but after running on the street for an hour or more, or 5 minutes with another ignition box, symptoms of 'fuel starvation' appeared.

I'll have a look there also. Haven't looked, but assume the Haynes/Clymer manual has a test procedure for the CDI box?

In too deep to quit now!

Griff

[canucklehead]

Ok... time for an update.

I had a look at the CDI box, good spark, so that seems to be eliminated. Put new plugs in anyway, since I had them on hand.

Tore the carbs apart, cleaned them again, this time with an ultrasonic cleaner. Some spooge came out, but not really very much.

New gaskets and o-rings, new float needle and seat. Adjusted idle mixture to 2 turns to start. Bench-sync'd.

Put everything back together, fired up and seems to run... still not very smooth. Rode around the block, seems much better than it was. Shut down, let it cool, and fired it up again. No choke, started easily but revs climbed up to about 4000. Settled down to about 1200 (per the tach).

Seems to be getting closer to being solved.  Going to check the carb linkage to see if something is hanging up and causing the revs to be high. Will also check for vac leaks.

At least it's running again


Griff

[jestercinti]

Is you carb vent tube clear, no kinks, and out of the wind?  Search for crosswind engine stumble.

Kinked and it mimics plugged gas cap. Directly in wind mimics fuel starvation at high speed.


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[Calpantera]

Is you carb vent tube clear, no kinks, and out of the wind?  Search for crosswind engine stumble.

Kinked and it mimics plugged gas cap. Directly in wind mimics fuel starvation at high speed.


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Ahhh carb vent in wind sounds like my issue, still replacing tank and cleaning carbs though